remove：无用配置

src/maisaka/builtin_tools.py

@@ -121,11 +121,7 @@ def create_builtin_tool_specs() -> List[ToolSpec]:
         ),
         _build_tool_spec(
             name="no_reply",
-            brief_description="本轮不发送可见回复，继续下一步思考。",
-        ),
-        _build_tool_spec(
-            name="stop",
-            brief_description="暂停当前内部循环，等待新的外部消息。",
+            brief_description="本轮不进行回复，等待其他用户的新消息。",
         ),
         _build_tool_spec(
             name="send_emoji",

src/maisaka/reasoning_engine.py

@@ -1282,7 +1282,7 @@ class MaisakaReasoningEngine:
         self._runtime._chat_history.append(history_message)
         return self._build_tool_success_result(
             tool_call.func_name,
-            "可见回复已生成并发送。",
+            "回复已生成并发送。",
             structured_content={
                 "msg_id": target_message_id,
                 "quote": quote_reply,