diff --git a/app/agent/tools/base.py b/app/agent/tools/base.py
index 8cc1b28c..691c0676 100644
--- a/app/agent/tools/base.py
+++ b/app/agent/tools/base.py
@@ -72,20 +72,22 @@ class MoviePilotTool(BaseTool, metaclass=ABCMeta):
                 # 非VERBOSE，重置缓冲区从头更新，保持消息编辑能力
                 self._stream_handler.reset()
         else:
-            # 非流式渠道：保持原有行为，取出 Agent 文字 + 工具消息合并独立发送
-            agent_message = (
-                await self._stream_handler.take() if self._stream_handler else ""
-            )
+            # 后台模式（无渠道信息）不发送工具调用消息
+            if self._channel:
+                # 非流式渠道：保持原有行为，取出 Agent 文字 + 工具消息合并独立发送
+                agent_message = (
+                    await self._stream_handler.take() if self._stream_handler else ""
+                )
 
-            messages = []
-            if agent_message:
-                messages.append(agent_message)
-            if tool_message:
-                messages.append(f"⚙️ => {tool_message}")
+                messages = []
+                if agent_message:
+                    messages.append(agent_message)
+                if tool_message:
+                    messages.append(f"⚙️ => {tool_message}")
 
-            if messages:
-                merged_message = "\n\n".join(messages)
-                await self.send_tool_message(merged_message)
+                if messages:
+                    merged_message = "\n\n".join(messages)
+                    await self.send_tool_message(merged_message)
 
         logger.debug(f"Executing tool {self.name} with args: {kwargs}")