fix(mcp): tolerate legacy tool DTO fields

apps/api/src/plugins/mcp/interfaces.py

@@ -30,7 +30,9 @@ class MCPTool:
     name: str
     description: str
     input_schema: dict[str, Any]
-    server_name: str
+    # 2026-05-06 Codex: 部分舊 provider 的 list_tools() 尚未傳 server_name。
+    # 先給 DTO 預設值，registry 會以 provider.name 補正，避免啟動登記直接 crash。
+    server_name: str = ""
 
 
 @dataclass

apps/api/src/services/mcp_tool_registry.py

@@ -21,8 +21,8 @@ MASTER §3.1.3 (B) AI 自主工具選擇
 
 from __future__ import annotations
 
-from dataclasses import dataclass, field
-from enum import Enum
+from dataclasses import dataclass, field, replace
+from enum import StrEnum
 from typing import Any
 
 import structlog
@@ -33,7 +33,7 @@ from src.plugins.mcp.registry import AuditedMCPToolProvider
 logger = structlog.get_logger(__name__)
 
 
-class SensorDimension(str, Enum):
+class SensorDimension(StrEnum):
     """8D 感官維度分類"""
     D1_K8S_STATE = "d1_k8s_state"
     D2_LOGS = "d2_logs"
@@ -111,6 +111,8 @@ class MCPToolRegistry:
 
         count = 0
         for tool in tools:
+            if not tool.server_name:
+                tool = replace(tool, server_name=provider.name)
             audited_provider = AuditedMCPToolProvider(provider)
             reg = _classify_tool(tool, audited_provider)
             self._tools.append(reg)