fix agent tools

app/agent/tools/base.py

@@ -38,6 +38,12 @@ class MoviePilotTool(BaseTool, metaclass=ABCMeta):
         agent_message = await self._callback_handler.get_message()
         if agent_message:
             await self.send_tool_message(agent_message)
+        # 发送执行工具说明
+        explanation = kwargs.get("explanation")
+        if explanation:
+            if not explanation.startswith("正在"):
+                explanation = "正在" + explanation
+            await self.send_tool_message(f"{explanation} ...")
         return await self.run(**kwargs)
 
     @abstractmethod