refs #699: preserve HMM policy MCP evidence

poc4_active_source_20260714/apps/poc4/mcp_discovery_ui.py

@@ -46,6 +46,12 @@ from src.mcp_tool_router import (
     build_mcp_tool_arguments,
     route_mcp_tool_across_servers_with_llm,
 )
+from src.mcp_result import (
+    has_actionable_text_result,
+    status_result_evidence,
+    status_result_summary,
+    text_result,
+)
 from src.oci_genai_sdk import (
     build_oci_genai_completion_client,
     temperature_for_model_profile,
@@ -4108,7 +4114,7 @@ def _mcp_summary(mcp_result: Any) -> dict[str, Any]:
         return {"type": type(mcp_result).__name__}
     payload = _mcp_response_payload(mcp_result)
     items = _mcp_items(mcp_result)
-    summary: dict[str, Any] = {}
+    summary: dict[str, Any] = status_result_summary(mcp_result)
     for key in ("toolName", "profile", "ordsPath", "generatedSql"):
         value = mcp_result.get(key) if key in mcp_result else payload.get(key)
         if value:
@@ -4195,6 +4201,8 @@ def _clean_agent_tool_query(value: object, fallback: str) -> str:
 def _mcp_has_actionable_result(mcp_result: Any) -> bool:
     if _mcp_generated_sql(mcp_result) or _mcp_items(mcp_result):
         return True
+    if has_actionable_text_result(mcp_result):
+        return True
     payload = _mcp_response_payload(mcp_result)
     results = payload.get("results")
     if isinstance(results, list) and results:
@@ -4259,7 +4267,10 @@ def _mcp_answer_evidence(
     if not isinstance(mcp_result, Mapping):
         return mcp_result
     payload = _mcp_response_payload(mcp_result)
-    evidence: dict[str, Any] = {}
+    evidence: dict[str, Any] = status_result_evidence(
+        mcp_result,
+        max_chars=max(3500, min(7000, max_text * 15)),
+    )
     for key in (
         "toolName",
         "profile",
@@ -5468,7 +5479,7 @@ def _prepare_hmm_hr_tool_query(
     """Prepare an HMM HR query without inheriting retired KB/VPD prompt rules."""
 
     fallback = str(question or "").strip()
-    if tool.name == "resolve_hr_term":
+    if tool.name in {"resolve_hr_term", "search_hr_policy"}:
         return fallback
     contextual_question = _hmm_demo_user_context(
         fallback,
@@ -5646,6 +5657,8 @@ def synthesize_answer(
         "say that clearly. Treat items_count=0 or results_count=0 as an actual "
         "zero-row result, not as missing tool delivery. Never claim that an audit "
         "event exists unless its identifier or audit result is in the evidence. "
+        "For compatibility MCP tools, the result string contains the factual "
+        "DOC and EVIDENCE lines; read it as evidence rather than treating it as metadata. "
         "For cross-source questions, keep structured contract/product facts separate "
         "from vector clause evidence, then combine only matching identifiers. If one "
         "source is missing, list confirmed and unconfirmed points separately instead "
@@ -5781,6 +5794,11 @@ def fallback_answer_from_mcp(
                 lines.append(f"- {title or '검색 결과'}{suffix}: {body}")
             else:
                 lines.append(f"- {compact}")
+    elif text_result(mcp_result):
+        result = text_result(mcp_result)
+        lines.append("")
+        lines.append("MCP 반환 근거:")
+        lines.append(result[:6000] + ("..." if len(result) > 6000 else ""))
     elif agent_steps:
         lines.append(f"Agent는 MCP tool을 {len(agent_steps)}회 호출했습니다.")
     else: