diff --git a/docs/design/492-token-selection-for-probe-reasoning/README.md b/docs/design/492-token-selection-for-probe-reasoning/README.md
new file mode 100644
index 0000000..25b9f70
--- /dev/null
+++ b/docs/design/492-token-selection-for-probe-reasoning/README.md
@@ -0,0 +1,38 @@
+# Redmine #492 - ORDS 검증/Reasoning 토큰 선택 흐름 개선 설계
+
+## 프로젝트 개요
+
+VPD Backoffice는 Oracle Database VPD/ORDS 기능을 백오피스 권한 테이블로 제어하기 위한 Spring Boot 관리 도구다. ORDS 검증과 MCP Reasoning은 Bearer Token으로 보호 객체를 호출하고, VPD/컬럼 NULL 처리 결과를 확인한다.
+
+## 목표
+
+ORDS 검증과 MCP Reasoning에서 등록된 토큰을 선택해 사용자/역할/만료 상태를 확인한 뒤 검증할 수 있게 한다.
+
+## 제약
+
+토큰 원문은 발급 직후 한 번만 표시되고 DB에는 `key_hash`와 prefix만 저장된다. 따라서 기존 등록 토큰을 선택하더라도 백오피스가 원문 bearer 값을 복원해 ORDS 호출에 사용할 수 없다.
+
+## 설계
+
+- 등록 토큰 select를 추가한다.
+- 선택한 토큰의 사용자, prefix, 만료, 회수 상태, 직접 역할, 그룹, 그룹 상속 역할을 preview로 표시한다.
+- 실제 ORDS 호출에는 기존처럼 bearer token 원문 입력이 필요하다.
+- 사용자가 등록 토큰을 선택한 경우, 입력한 원문이 선택 token id의 hash와 일치하는지 service에서 검증한다.
+- 선택 토큰과 원문이 맞지 않으면 ORDS 호출 전에 `INVALID_TOKEN`으로 차단한다.
+- 원문 입력 없이 선택 토큰만으로 호출할 수 없다는 안내를 화면에 표시한다.
+
+## 완료 기준
+
+- `/probe`에서 등록 토큰 선택과 token context preview가 표시된다.
+- `/mcp-reasoning`에서 등록 토큰 선택과 token context preview가 표시된다.
+- 선택 토큰 변경 시 사용자/역할/만료 상태 preview가 즉시 갱신된다.
+- 선택 토큰과 입력 원문이 불일치하면 ORDS 호출 전에 `INVALID_TOKEN`으로 실패한다.
+- 기존 raw bearer token만 입력하는 흐름은 유지된다.
+
+## 검증
+
+- `mvn test`
+- Playwright:
+  - `/probe` token select/context preview 확인
+  - `/mcp-reasoning` token select/context preview 확인
+  - 390px 모바일 body overflow 없음
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/domain/mcp/McpReasoningCommand.java b/src/main/java/com/cloudhandson/vpdbackoffice/domain/mcp/McpReasoningCommand.java
index 02086b9..3b137a4 100644
--- a/src/main/java/com/cloudhandson/vpdbackoffice/domain/mcp/McpReasoningCommand.java
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/domain/mcp/McpReasoningCommand.java
@@ -1,6 +1,7 @@
 package com.cloudhandson.vpdbackoffice.domain.mcp;
 
 public record McpReasoningCommand(
+    Long tokenKeyId,
     long objectId,
     String bearerToken,
     int limit,
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/domain/probe/ProbeCommand.java b/src/main/java/com/cloudhandson/vpdbackoffice/domain/probe/ProbeCommand.java
index 90b69a7..a830e74 100644
--- a/src/main/java/com/cloudhandson/vpdbackoffice/domain/probe/ProbeCommand.java
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/domain/probe/ProbeCommand.java
@@ -6,6 +6,7 @@ import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.Positive;
 
 public record ProbeCommand(
+    Long tokenKeyId,
     @Positive long objectId,
     @NotBlank String bearerToken,
     @Min(1) @Max(500) int limit
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/domain/token/TokenContextView.java b/src/main/java/com/cloudhandson/vpdbackoffice/domain/token/TokenContextView.java
new file mode 100644
index 0000000..01cb575
--- /dev/null
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/domain/token/TokenContextView.java
@@ -0,0 +1,37 @@
+package com.cloudhandson.vpdbackoffice.domain.token;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+public record TokenContextView(
+    long keyId,
+    long userId,
+    String username,
+    String keyPrefix,
+    LocalDateTime expiresAt,
+    LocalDateTime revokedAt,
+    String description,
+    boolean active,
+    List<String> directRoles,
+    List<String> groups,
+    List<String> inheritedRoles
+) {
+
+  public String statusLabel() {
+    if (active) {
+      return "ACTIVE";
+    }
+    return revokedAt == null ? "EXPIRED" : "REVOKED";
+  }
+
+  public String maskedToken() {
+    if (keyPrefix == null || keyPrefix.isBlank()) {
+      return "****";
+    }
+    return keyPrefix + "****";
+  }
+
+  public String displayLabel() {
+    return "#" + keyId + " / " + username + " / " + statusLabel();
+  }
+}
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/service/BearerTokenService.java b/src/main/java/com/cloudhandson/vpdbackoffice/service/BearerTokenService.java
index fcb1547..cafd48d 100644
--- a/src/main/java/com/cloudhandson/vpdbackoffice/service/BearerTokenService.java
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/service/BearerTokenService.java
@@ -2,17 +2,27 @@ package com.cloudhandson.vpdbackoffice.service;
 
 import com.cloudhandson.vpdbackoffice.config.BackofficeProperties;
 import com.cloudhandson.vpdbackoffice.domain.audit.AuditEvent;
+import com.cloudhandson.vpdbackoffice.domain.group.GroupRoleView;
+import com.cloudhandson.vpdbackoffice.domain.group.GroupUserView;
 import com.cloudhandson.vpdbackoffice.domain.token.BearerTokenRecord;
 import com.cloudhandson.vpdbackoffice.domain.token.IssuedToken;
+import com.cloudhandson.vpdbackoffice.domain.token.TokenContextView;
 import com.cloudhandson.vpdbackoffice.domain.token.TokenIssueCommand;
 import com.cloudhandson.vpdbackoffice.domain.user.AppUser;
+import com.cloudhandson.vpdbackoffice.domain.user.UserRoleView;
 import com.cloudhandson.vpdbackoffice.mapper.BearerTokenMapper;
+import com.cloudhandson.vpdbackoffice.mapper.GroupMapper;
 import com.cloudhandson.vpdbackoffice.mapper.UserMapper;
 import java.time.Clock;
 import java.time.LocalDateTime;
 import java.time.OffsetDateTime;
 import java.time.ZoneId;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.LinkedHashSet;
 import java.util.List;
+import java.util.Map;
+import java.util.Set;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -21,6 +31,7 @@ public class BearerTokenService {
 
   private final BearerTokenMapper tokenMapper;
   private final UserMapper userMapper;
+  private final GroupMapper groupMapper;
   private final AuditService auditService;
   private final TokenGenerator tokenGenerator;
   private final TokenHasher tokenHasher;
@@ -30,6 +41,7 @@ public class BearerTokenService {
   public BearerTokenService(
       BearerTokenMapper tokenMapper,
       UserMapper userMapper,
+      GroupMapper groupMapper,
       AuditService auditService,
       TokenGenerator tokenGenerator,
       TokenHasher tokenHasher,
@@ -38,6 +50,7 @@ public class BearerTokenService {
   ) {
     this.tokenMapper = tokenMapper;
     this.userMapper = userMapper;
+    this.groupMapper = groupMapper;
     this.auditService = auditService;
     this.tokenGenerator = tokenGenerator;
     this.tokenHasher = tokenHasher;
@@ -49,6 +62,31 @@ public class BearerTokenService {
     return tokenMapper.findAll();
   }
 
+  public List<TokenContextView> findTokenContextOptions() {
+    List<BearerTokenRecord> tokens = tokenMapper.findAll();
+    List<GroupUserView> groupUsers = groupMapper.findGroupUsers();
+    Map<Long, List<String>> directRolesByUser = directRolesByUser();
+    Map<Long, List<String>> groupsByUser = groupsByUser(groupUsers);
+    Map<Long, List<String>> inheritedRolesByUser = inheritedRolesByUser(groupUsers);
+    LocalDateTime now = LocalDateTime.now(clock.withZone(ZoneId.systemDefault()));
+
+    return tokens.stream()
+        .map(token -> new TokenContextView(
+            token.keyId(),
+            token.userId(),
+            token.username(),
+            token.keyPrefix(),
+            token.expiresAt(),
+            token.revokedAt(),
+            token.description(),
+            token.active(now),
+            directRolesByUser.getOrDefault(token.userId(), List.of()),
+            groupsByUser.getOrDefault(token.userId(), List.of()),
+            inheritedRolesByUser.getOrDefault(token.userId(), List.of())
+        ))
+        .toList();
+  }
+
   public BearerTokenRecord findById(long keyId) {
     return tokenMapper.findById(keyId);
   }
@@ -68,6 +106,45 @@ public class BearerTokenService {
     return hash.equalsIgnoreCase(record.keyHash());
   }
 
+  private Map<Long, List<String>> directRolesByUser() {
+    Map<Long, Set<String>> grouped = new LinkedHashMap<>();
+    for (UserRoleView view : userMapper.findUserRoles()) {
+      grouped.computeIfAbsent(view.userId(), key -> new LinkedHashSet<>()).add(view.roleName());
+    }
+    return toListMap(grouped);
+  }
+
+  private Map<Long, List<String>> groupsByUser(List<GroupUserView> groupUsers) {
+    Map<Long, Set<String>> grouped = new LinkedHashMap<>();
+    for (GroupUserView view : groupUsers) {
+      grouped.computeIfAbsent(view.userId(), key -> new LinkedHashSet<>())
+          .add(view.groupCode() + " / " + view.groupName());
+    }
+    return toListMap(grouped);
+  }
+
+  private Map<Long, List<String>> inheritedRolesByUser(List<GroupUserView> groupUsers) {
+    Map<Long, Set<String>> rolesByGroup = new LinkedHashMap<>();
+    for (GroupRoleView view : groupMapper.findGroupRoles()) {
+      rolesByGroup.computeIfAbsent(view.groupId(), key -> new LinkedHashSet<>()).add(view.roleName());
+    }
+
+    Map<Long, Set<String>> rolesByUser = new LinkedHashMap<>();
+    for (GroupUserView view : groupUsers) {
+      Set<String> roles = rolesByGroup.getOrDefault(view.groupId(), Set.of());
+      if (!roles.isEmpty()) {
+        rolesByUser.computeIfAbsent(view.userId(), key -> new LinkedHashSet<>()).addAll(roles);
+      }
+    }
+    return toListMap(rolesByUser);
+  }
+
+  private Map<Long, List<String>> toListMap(Map<Long, Set<String>> source) {
+    Map<Long, List<String>> result = new LinkedHashMap<>();
+    source.forEach((key, value) -> result.put(key, new ArrayList<>(value)));
+    return result;
+  }
+
   @Transactional
   public IssuedToken issueToken(TokenIssueCommand command) {
     AppUser user = userMapper.findById(command.userId());
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/service/McpReasoningService.java b/src/main/java/com/cloudhandson/vpdbackoffice/service/McpReasoningService.java
index 017083b..46e1bf0 100644
--- a/src/main/java/com/cloudhandson/vpdbackoffice/service/McpReasoningService.java
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/service/McpReasoningService.java
@@ -41,6 +41,7 @@ public class McpReasoningService {
     ProtectedObject object = protectedObjectService.assertEnabled(command.objectId());
     McpToolView tool = toolRegistry.toolFor(object);
     ProbeResult probeResult = ordsProbeService.runProbe(new ProbeCommand(
+        command.tokenKeyId(),
         command.objectId(),
         command.bearerToken(),
         normalizeLimit(command.limit())
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/service/McpSseService.java b/src/main/java/com/cloudhandson/vpdbackoffice/service/McpSseService.java
index 25cf700..4cf636b 100644
--- a/src/main/java/com/cloudhandson/vpdbackoffice/service/McpSseService.java
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/service/McpSseService.java
@@ -111,7 +111,7 @@ public class McpSseService {
     McpToolView tool = findTool(toolName);
     String bearerToken = arguments.path("bearerToken").asText("");
     int limit = normalizeLimit(arguments.path("limit").asInt(50));
-    ProbeResult probeResult = ordsProbeService.runProbe(new ProbeCommand(tool.objectId(), bearerToken, limit));
+    ProbeResult probeResult = ordsProbeService.runProbe(new ProbeCommand(null, tool.objectId(), bearerToken, limit));
 
     ObjectNode payload = objectMapper.createObjectNode();
     payload.put("toolName", tool.name());
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/service/OrdsProbeService.java b/src/main/java/com/cloudhandson/vpdbackoffice/service/OrdsProbeService.java
index c750588..abca541 100644
--- a/src/main/java/com/cloudhandson/vpdbackoffice/service/OrdsProbeService.java
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/service/OrdsProbeService.java
@@ -75,10 +75,23 @@ public class OrdsProbeService {
       ));
     }
 
-    BearerTokenRecord token = tokenService.findByPlainToken(command.bearerToken());
-    if (token == null) {
-      return auditAndReturn(command, ProbeResult.blocked(
-          ProbeStatus.TOKEN_NOT_FOUND, "TOKEN_NOT_FOUND", "토큰을 찾을 수 없습니다."));
+    BearerTokenRecord token;
+    if (command.tokenKeyId() == null) {
+      token = tokenService.findByPlainToken(command.bearerToken());
+      if (token == null) {
+        return auditAndReturn(command, ProbeResult.blocked(
+            ProbeStatus.TOKEN_NOT_FOUND, "TOKEN_NOT_FOUND", "토큰을 찾을 수 없습니다."));
+      }
+    } else {
+      token = tokenService.findById(command.tokenKeyId());
+      if (token == null) {
+        return auditAndReturn(command, ProbeResult.blocked(
+            ProbeStatus.INVALID_TOKEN, "INVALID_TOKEN", "선택한 등록 토큰을 찾을 수 없습니다."));
+      }
+      if (!tokenService.matches(token, command.bearerToken())) {
+        return auditAndReturn(command, ProbeResult.blocked(
+            ProbeStatus.INVALID_TOKEN, "INVALID_TOKEN", "입력한 Bearer Token 원문이 선택한 등록 토큰과 일치하지 않습니다."));
+      }
     }
     if (!token.active(LocalDateTime.now(clock.withZone(ZoneId.systemDefault())))) {
       return auditAndReturn(command, ProbeResult.blocked(
@@ -232,6 +245,9 @@ public class OrdsProbeService {
   }
 
   private Long tokenKeyId(ProbeCommand command) {
+    if (command.tokenKeyId() != null) {
+      return command.tokenKeyId();
+    }
     BearerTokenRecord token = tokenService.findByPlainToken(command.bearerToken());
     return token == null ? null : token.keyId();
   }
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/web/McpReasoningController.java b/src/main/java/com/cloudhandson/vpdbackoffice/web/McpReasoningController.java
index 13daef6..c20c3f6 100644
--- a/src/main/java/com/cloudhandson/vpdbackoffice/web/McpReasoningController.java
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/web/McpReasoningController.java
@@ -1,7 +1,7 @@
 package com.cloudhandson.vpdbackoffice.web;
 
 import com.cloudhandson.vpdbackoffice.domain.mcp.McpReasoningCommand;
-import com.cloudhandson.vpdbackoffice.domain.mcp.McpToolView;
+import com.cloudhandson.vpdbackoffice.service.BearerTokenService;
 import com.cloudhandson.vpdbackoffice.service.McpReasoningService;
 import com.cloudhandson.vpdbackoffice.service.McpToolRegistry;
 import com.cloudhandson.vpdbackoffice.service.ProtectedObjectService;
@@ -22,15 +22,18 @@ public class McpReasoningController {
   private final McpToolRegistry toolRegistry;
   private final McpReasoningService reasoningService;
   private final ProtectedObjectService protectedObjectService;
+  private final BearerTokenService tokenService;
 
   public McpReasoningController(
       McpToolRegistry toolRegistry,
       McpReasoningService reasoningService,
-      ProtectedObjectService protectedObjectService
+      ProtectedObjectService protectedObjectService,
+      BearerTokenService tokenService
   ) {
     this.toolRegistry = toolRegistry;
     this.reasoningService = reasoningService;
     this.protectedObjectService = protectedObjectService;
+    this.tokenService = tokenService;
   }
 
   @GetMapping("/mcp-reasoning")
@@ -38,10 +41,12 @@ public class McpReasoningController {
     try {
       model.addAttribute("objects", protectedObjectService.findEnabled());
       model.addAttribute("tools", toolRegistry.listTools());
+      model.addAttribute("tokens", tokenService.findTokenContextOptions());
     } catch (DataAccessException e) {
       RuntimeErrorMessage message = RuntimeErrorMessages.dataAccess(e);
       model.addAttribute("objects", List.of());
       model.addAttribute("tools", List.of());
+      model.addAttribute("tokens", List.of());
       model.addAttribute("runtimeError", message);
     }
     return "mcp-reasoning";
@@ -77,6 +82,7 @@ public class McpReasoningController {
 
   @PostMapping("/mcp-reasoning")
   public String reason(
+      @RequestParam(required = false) Long tokenKeyId,
       @RequestParam long objectId,
       @RequestParam String bearerToken,
       @RequestParam(defaultValue = "50") int limit,
@@ -84,7 +90,7 @@ public class McpReasoningController {
       Model model
   ) {
     model.addAttribute("result", reasoningService.reason(
-        new McpReasoningCommand(objectId, bearerToken, limit, question)));
+        new McpReasoningCommand(tokenKeyId, objectId, bearerToken, limit, question)));
     return "fragments/mcp-reasoning-result :: result";
   }
 }
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/web/ProbeController.java b/src/main/java/com/cloudhandson/vpdbackoffice/web/ProbeController.java
index 96d956c..c6563c2 100644
--- a/src/main/java/com/cloudhandson/vpdbackoffice/web/ProbeController.java
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/web/ProbeController.java
@@ -1,6 +1,7 @@
 package com.cloudhandson.vpdbackoffice.web;
 
 import com.cloudhandson.vpdbackoffice.domain.probe.ProbeCommand;
+import com.cloudhandson.vpdbackoffice.service.BearerTokenService;
 import com.cloudhandson.vpdbackoffice.service.OrdsProbeService;
 import com.cloudhandson.vpdbackoffice.service.ProtectedObjectService;
 import org.springframework.stereotype.Controller;
@@ -14,29 +15,34 @@ public class ProbeController {
 
   private final OrdsProbeService probeService;
   private final ProtectedObjectService protectedObjectService;
+  private final BearerTokenService tokenService;
 
   public ProbeController(
       OrdsProbeService probeService,
-      ProtectedObjectService protectedObjectService
+      ProtectedObjectService protectedObjectService,
+      BearerTokenService tokenService
   ) {
     this.probeService = probeService;
     this.protectedObjectService = protectedObjectService;
+    this.tokenService = tokenService;
   }
 
   @GetMapping("/probe")
   public String probe(Model model) {
     model.addAttribute("objects", protectedObjectService.findEnabled());
+    model.addAttribute("tokens", tokenService.findTokenContextOptions());
     return "probe";
   }
 
   @PostMapping("/probe")
   public String run(
+      @RequestParam(required = false) Long tokenKeyId,
       @RequestParam long objectId,
       @RequestParam String bearerToken,
       @RequestParam(defaultValue = "50") int limit,
       Model model
   ) {
-    model.addAttribute("result", probeService.runProbe(new ProbeCommand(objectId, bearerToken, limit)));
+    model.addAttribute("result", probeService.runProbe(new ProbeCommand(tokenKeyId, objectId, bearerToken, limit)));
     return "fragments/probe-result :: result";
   }
 }
diff --git a/src/main/resources/static/css/app.css b/src/main/resources/static/css/app.css
index 66f7c24..3c7589b 100644
--- a/src/main/resources/static/css/app.css
+++ b/src/main/resources/static/css/app.css
@@ -335,12 +335,29 @@ body {
   min-width: 0;
 }
 
+.token-form {
+  align-items: start;
+}
+
+.token-form .rw-btn-primary {
+  align-self: end;
+}
+
 .form-grid label {
   color: var(--rw-muted);
   font-size: .875rem;
   font-weight: 600;
 }
 
+.form-hint {
+  color: var(--rw-muted);
+  display: block;
+  font-size: .78rem;
+  font-weight: 500;
+  line-height: 1.35;
+  margin-top: .35rem;
+}
+
 .form-grid .span-2 {
   grid-column: span 2;
 }
@@ -547,6 +564,29 @@ body {
   overflow-wrap: anywhere;
 }
 
+.token-context-preview {
+  align-self: stretch;
+  background: var(--rw-surface);
+  border: 1px solid var(--rw-border);
+  border-radius: 8px;
+  padding: .9rem;
+}
+
+.token-context-preview .compact-heading {
+  gap: .5rem;
+  margin-bottom: .75rem;
+}
+
+.token-context-preview .compact-heading h3 {
+  font-size: .92rem;
+  font-weight: 800;
+  margin: 0;
+}
+
+.token-context-preview .form-hint {
+  margin-bottom: 0;
+}
+
 .policy-apply-flow {
   align-items: center;
   display: flex;
diff --git a/src/main/resources/static/js/app.js b/src/main/resources/static/js/app.js
index 74db992..c76a12e 100644
--- a/src/main/resources/static/js/app.js
+++ b/src/main/resources/static/js/app.js
@@ -441,6 +441,51 @@ function setWizardPreview(wizard, name, value) {
   });
 }
 
+function setTokenPreview(preview, name, value) {
+  preview.querySelectorAll(`[data-token-preview="${name}"]`).forEach((target) => {
+    target.textContent = value;
+  });
+}
+
+function updateTokenContextPreview(select) {
+  const form = select.closest('form');
+  const preview = form?.querySelector('[data-token-context-preview]');
+  if (!preview) {
+    return;
+  }
+  const option = selectedOption(select);
+  if (!option || !option.value) {
+    setTokenPreview(preview, 'status', '미선택');
+    setTokenPreview(preview, 'username', '원문 직접 입력');
+    setTokenPreview(preview, 'prefix', '-');
+    setTokenPreview(preview, 'expiresAt', '-');
+    setTokenPreview(preview, 'directRoles', '-');
+    setTokenPreview(preview, 'groups', '-');
+    setTokenPreview(preview, 'inheritedRoles', '-');
+    setTokenPreview(preview, 'description', '토큰을 선택하면 등록된 사용자/역할 컨텍스트를 먼저 확인할 수 있습니다.');
+    return;
+  }
+
+  const directRoles = splitList(option.dataset.directRoles || '');
+  const groups = splitList(option.dataset.groups || '');
+  const inheritedRoles = splitList(option.dataset.inheritedRoles || '');
+  setTokenPreview(preview, 'status', option.dataset.status || '-');
+  setTokenPreview(preview, 'username', option.dataset.username || '-');
+  setTokenPreview(preview, 'prefix', option.dataset.prefix || '****');
+  setTokenPreview(preview, 'expiresAt', option.dataset.expiresAt || '-');
+  setTokenPreview(preview, 'directRoles', formatList(directRoles, '직접 역할 없음'));
+  setTokenPreview(preview, 'groups', formatList(groups, '소속 그룹 없음'));
+  setTokenPreview(preview, 'inheritedRoles', formatList(inheritedRoles, '그룹 상속 역할 없음'));
+  setTokenPreview(preview, 'description', option.dataset.description || '설명 없음');
+}
+
+function initTokenContextPreviews() {
+  document.querySelectorAll('[data-token-context-select]').forEach((select) => {
+    select.addEventListener('change', () => updateTokenContextPreview(select));
+    updateTokenContextPreview(select);
+  });
+}
+
 function sqlLiteral(value) {
   return `'${String(value || '').replaceAll("'", "''")}'`;
 }
@@ -745,6 +790,7 @@ document.addEventListener('DOMContentLoaded', () => {
     select.addEventListener('change', () => filterGroupDetail(select.id));
     filterGroupDetail(select.id);
   });
+  initTokenContextPreviews();
   const objectSelect = document.querySelector('select[name="objectRef"]');
   if (objectSelect) {
     objectSelect.addEventListener('change', () => {
diff --git a/src/main/resources/templates/mcp-reasoning.html b/src/main/resources/templates/mcp-reasoning.html
index 98aaf48..db7cb49 100644
--- a/src/main/resources/templates/mcp-reasoning.html
+++ b/src/main/resources/templates/mcp-reasoning.html
@@ -22,12 +22,63 @@
       <h2>권한 결과 해석</h2>
       <a class="btn btn-sm btn-outline-secondary" href="/mcp/tools" target="_blank" rel="noreferrer">도구 JSON</a>
     </div>
-    <form hx-post="/mcp-reasoning" hx-target="#mcp-result" hx-swap="innerHTML" class="form-grid">
+    <form hx-post="/mcp-reasoning" hx-target="#mcp-result" hx-swap="innerHTML" class="form-grid token-form">
       <input type="hidden" th:name="${_csrf.parameterName}" th:value="${_csrf.token}">
+      <label>
+        등록 토큰
+        <select class="form-select" name="tokenKeyId" data-token-context-select>
+          <option value="">원문 직접 입력</option>
+          <option th:each="token : ${tokens}"
+                  th:value="${token.keyId()}"
+                  th:text="${token.displayLabel()}"
+                  th:attr="data-username=${token.username()},
+                           data-prefix=${token.maskedToken()},
+                           data-status=${token.statusLabel()},
+                           data-expires-at=${token.expiresAt()},
+                           data-description=${token.description()},
+                           data-direct-roles=${#strings.listJoin(token.directRoles(), '|')},
+                           data-groups=${#strings.listJoin(token.groups(), '|')},
+                           data-inherited-roles=${#strings.listJoin(token.inheritedRoles(), '|')}"></option>
+        </select>
+      </label>
       <label>
         Bearer Token 원문
         <input class="form-control" name="bearerToken" type="password" autocomplete="off" required>
+        <span class="form-hint">선택 토큰은 컨텍스트 확인용입니다. ORDS 호출에는 원문 입력이 필요합니다.</span>
       </label>
+      <aside class="token-context-preview effective-preview span-2" data-token-context-preview>
+        <div class="section-heading compact-heading">
+          <h3>선택 토큰 컨텍스트</h3>
+          <span class="badge text-bg-secondary" data-token-preview="status">미선택</span>
+        </div>
+        <dl>
+          <div>
+            <dt>사용자</dt>
+            <dd data-token-preview="username">원문 직접 입력</dd>
+          </div>
+          <div>
+            <dt>Prefix</dt>
+            <dd><code data-token-preview="prefix">-</code></dd>
+          </div>
+          <div>
+            <dt>만료</dt>
+            <dd data-token-preview="expiresAt">-</dd>
+          </div>
+          <div>
+            <dt>직접 역할</dt>
+            <dd data-token-preview="directRoles">-</dd>
+          </div>
+          <div>
+            <dt>그룹</dt>
+            <dd data-token-preview="groups">-</dd>
+          </div>
+          <div>
+            <dt>그룹 상속 역할</dt>
+            <dd data-token-preview="inheritedRoles">-</dd>
+          </div>
+        </dl>
+        <p class="form-hint" data-token-preview="description">질문 전에 이 토큰이 어느 사용자/역할 컨텍스트인지 확인합니다.</p>
+      </aside>
       <label>
         조회 대상
         <select class="form-select" id="mcp-reasoning-object" name="objectId" required>
diff --git a/src/main/resources/templates/probe.html b/src/main/resources/templates/probe.html
index c03bef8..9c9bfd4 100644
--- a/src/main/resources/templates/probe.html
+++ b/src/main/resources/templates/probe.html
@@ -16,12 +16,63 @@
       <h2>ORDS 호출</h2>
       <a class="btn btn-sm rw-btn-secondary" href="/mcp-reasoning">MCP Reasoning으로 해석</a>
     </div>
-    <form hx-post="/probe" hx-target="#probe-result" hx-swap="innerHTML" class="form-grid">
+    <form hx-post="/probe" hx-target="#probe-result" hx-swap="innerHTML" class="form-grid token-form">
       <input type="hidden" th:name="${_csrf.parameterName}" th:value="${_csrf.token}">
+      <label>
+        등록 토큰
+        <select class="form-select" name="tokenKeyId" data-token-context-select>
+          <option value="">원문 직접 입력</option>
+          <option th:each="token : ${tokens}"
+                  th:value="${token.keyId()}"
+                  th:text="${token.displayLabel()}"
+                  th:attr="data-username=${token.username()},
+                           data-prefix=${token.maskedToken()},
+                           data-status=${token.statusLabel()},
+                           data-expires-at=${token.expiresAt()},
+                           data-description=${token.description()},
+                           data-direct-roles=${#strings.listJoin(token.directRoles(), '|')},
+                           data-groups=${#strings.listJoin(token.groups(), '|')},
+                           data-inherited-roles=${#strings.listJoin(token.inheritedRoles(), '|')}"></option>
+        </select>
+      </label>
       <label>
         Bearer Token 원문
         <input class="form-control" name="bearerToken" type="password" autocomplete="off" required>
+        <span class="form-hint">등록 토큰을 선택해도 원문은 저장되지 않아 실제 호출 시 필요합니다.</span>
       </label>
+      <aside class="token-context-preview effective-preview span-2" data-token-context-preview>
+        <div class="section-heading compact-heading">
+          <h3>선택 토큰 컨텍스트</h3>
+          <span class="badge text-bg-secondary" data-token-preview="status">미선택</span>
+        </div>
+        <dl>
+          <div>
+            <dt>사용자</dt>
+            <dd data-token-preview="username">원문 직접 입력</dd>
+          </div>
+          <div>
+            <dt>Prefix</dt>
+            <dd><code data-token-preview="prefix">-</code></dd>
+          </div>
+          <div>
+            <dt>만료</dt>
+            <dd data-token-preview="expiresAt">-</dd>
+          </div>
+          <div>
+            <dt>직접 역할</dt>
+            <dd data-token-preview="directRoles">-</dd>
+          </div>
+          <div>
+            <dt>그룹</dt>
+            <dd data-token-preview="groups">-</dd>
+          </div>
+          <div>
+            <dt>그룹 상속 역할</dt>
+            <dd data-token-preview="inheritedRoles">-</dd>
+          </div>
+        </dl>
+        <p class="form-hint" data-token-preview="description">토큰을 선택하면 등록된 사용자/역할 컨텍스트를 먼저 확인할 수 있습니다.</p>
+      </aside>
       <label>
         ORDS 트랙
         <select class="form-select" name="objectId" required>