diff --git a/ga.py b/ga.py
index cf2e210b..15fdb71b 100644
--- a/ga.py
+++ b/ga.py
@@ -477,7 +477,8 @@ class GenericAgentHandler(BaseHandler):
             return self._retry_or_exit("[ERROR] Blank response, regenerate and tooluse")
         if '[!!! 流异常中断' in content[-100:] or '!!!Error:' in content[50:][-100:] or (content.endswith('</summary>') and len(content) < 100):
             return self._retry_or_exit("[ERROR] Incomplete response. Regenerate and tooluse.")
-        if '</｜DSML｜' in content.rstrip()[-50:] and content.rstrip().endswith('>'):
+        tail = content.rstrip()[-50:]
+        if 'DSML' in tail and '｜' in tail and tail.endswith('>'):
             return self._retry_or_exit("[ERROR] Tool call format invalid; no tool was called. Regenerate using proper tool calls.")
         if 'max_tokens !!!]' in content[-100:]:
             return self._retry_or_exit("[ERROR] max_tokens limit reached. Use multi small steps to do it.")