Update tools.py

tools.py

@@ -81,7 +81,7 @@ def transcribe_youtube(youtube_url: str) -> str:
         transcript = youtube_api.fetch(video_id)
 
         # keep only text
-        txt = '\n'.join([s.text for s in transcript.snippets])
-        return txt
+        text = '\n'.join([s.text for s in transcript.snippets])
+        return text
     except Exception as e:
         return f"transcribe_youtube failed: {e}"