diff --git a/modules/terminal_manager.py b/modules/terminal_manager.py
index 72e409a..2cf2b4b 100644
--- a/modules/terminal_manager.py
+++ b/modules/terminal_manager.py
@@ -328,14 +328,18 @@ class TerminalManager:
             return {
                 "success": False,
                 "error": "没有活动终端会话",
-                "suggestion": "请先使用 terminal_session 打开一个终端"
+                "suggestion": "请先使用 terminal_session 打开一个终端",
+                "status": "error",
+                "output": "没有活动终端会话"
             }
         
         if target_session not in self.terminals:
             return {
                 "success": False,
                 "error": f"终端会话 '{target_session}' 不存在",
-                "existing_sessions": list(self.terminals.keys())
+                "existing_sessions": list(self.terminals.keys()),
+                "status": "error",
+                "output": f"终端会话 '{target_session}' 不存在"
             }
         
         terminal = self.terminals[target_session]
@@ -479,14 +483,18 @@ class TerminalManager:
             return {
                 "success": False,
                 "error": "没有活动终端会话",
-                "suggestion": "请先使用 terminal_session 打开一个终端"
+                "suggestion": "请先使用 terminal_session 打开一个终端",
+                "status": "error",
+                "output": "没有活动终端会话"
             }
-        
+
         if target_session not in self.terminals:
             return {
                 "success": False,
                 "error": f"终端会话 '{target_session}' 不存在",
-                "existing_sessions": list(self.terminals.keys())
+                "existing_sessions": list(self.terminals.keys()),
+                "status": "error",
+                "output": f"终端会话 '{target_session}' 不存在"
             }
         
         # 发送命令
@@ -517,7 +525,7 @@ class TerminalManager:
             result["status"] = "timeout"
             result["success"] = False
             result["message"] = result.get("message") or f"命令超时（{int(base_timeout)}秒）"
-        
+
         return result
     
     def get_terminal_output(
diff --git a/utils/tool_result_formatter.py b/utils/tool_result_formatter.py
index 0aa5949..bb59ac2 100644
--- a/utils/tool_result_formatter.py
+++ b/utils/tool_result_formatter.py
@@ -308,6 +308,8 @@ def _plain_command_output(result_data: Dict[str, Any]) -> str:
     timeout = result_data.get("timeout")
     return_code = result_data.get("return_code")
     truncated = result_data.get("truncated")
+    error = result_data.get("error")
+    message = result_data.get("message")
 
     prefixes = []
     if status in {"timeout"} and timeout:
@@ -328,6 +330,14 @@ def _plain_command_output(result_data: Dict[str, Any]) -> str:
     if truncated:
         prefixes.append("[truncated]")
 
+    # 如果执行失败且没有输出，优先显示错误信息
+    if not result_data.get("success") and not output:
+        err_text = error or message
+        if err_text:
+            prefix_text = "".join(prefixes) if prefixes else "[error]"
+            return f"{prefix_text} {err_text}" if prefix_text else err_text
+        # 没有错误文本则仍走后面的输出逻辑（可能显示 no_output）
+
     prefix_text = "".join(prefixes)
     if prefix_text and output:
         return f"{prefix_text}\n{output}"