p2-mcp-schema-error-step-enhancements

backend/python/app/api/chat_service.py

@@ -3463,6 +3463,7 @@ async def _send_message_core(
 
 
                                     _schema = {"type": "object", "properties": {}}
+                                _schema = _normalize_mcp_schema(_schema)
 
 
 
@@ -5228,7 +5229,7 @@ async def _send_message_core(
 
 
 
-                                            tool_result = f"[工具调用已被策略拦截] {_policy_check.get('message', _reason)}"
+                                            tool_result = f"[策略拦截: {_policy_check.get('message', _reason)}] 建议: 检查权限设置或新开对话"
 
 
 
@@ -5404,7 +5405,7 @@ async def _send_message_core(
 
 
 
-                                            tool_result = "[MCP 工具未找到或映射缺失]"
+                                            tool_result = "[MCP 工具未找到] 建议: 检查工具名或尝试其他MCP工具。可用: " + str(list(mcp_tool_map.keys())[:5])
 
 
 
@@ -8402,6 +8403,35 @@ def _resolve_agent_tool_policy(agents):
 
 
 
+def _normalize_mcp_schema(schema: dict) -> dict:
+    """MCP JSON Schema -> OpenAI function calling 兼容。
+    处理: $ref, oneOf/anyOf -> first option, 剥离非标关键字"""
+    if not isinstance(schema, dict):
+        return {"type": "object", "properties": {}}
+    if "$ref" in schema:
+        return {"type": "object", "properties": {}}
+    if "oneOf" in schema or "anyOf" in schema:
+        opts = schema.get("oneOf") or schema.get("anyOf") or []
+        if opts and isinstance(opts[0], dict):
+            return _normalize_mcp_schema(opts[0])
+        return {"type": "object", "properties": {}}
+    if "allOf" in schema:
+        merged = {"type": "object", "properties": {}}
+        for s in schema.get("allOf", []):
+            sub = _normalize_mcp_schema(s)
+            if sub.get("properties"):
+                merged["properties"].update(sub["properties"])
+        return merged
+    result = {}
+    for k in ("type", "properties", "required", "description", "enum", "items"):
+        if k in schema:
+            result[k] = schema[k]
+    if result.get("type") != "object":
+        result["type"] = "object"
+    if "properties" not in result:
+        result["properties"] = {}
+    return result
+
 
 def _check_tool_policy(func_name, mcp_info, skills, policy, call_count, round_count):
 

backend/python/app/api/chat_skill.py

@@ -1272,7 +1272,7 @@ def _execute_skill_tool(
 
 
 
-        return f"工具 '{func_name}' 执行结果: 已处理输入内容, 但未找到对应的技能定义。请基于通用知识回复用户。"
+        return f"工具 '{func_name}' 执行结果: 已处理输入内容, 但未找到对应的技能定义。请基于通用知识回复用户。如有已加载的技能，可使用其名称直接调用。"