Update app.py

modified docstring, maybe it will work

app.py

@@ -19,19 +19,19 @@ def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return
     return "What magic will you build ?"
 
 @tool
-def get_news_headlines(headlines: str)-> str:
-    """A tool that fetches the most recent headlines
+def get_news_headlines(headlines: str) -> str:
+    """A tool that fetches the three most recent headlines from the news.
     Args:
-        headlines: A string representing the latest news headlines
+        headlines: A string representing the latest three news headlines.
     """
     try:
         hl = DuckDuckGoSearchTool()
         results = hl.run(f"{headlines} news")
-        return f"The current news headlines are {results}"
+        return f"The three most recent news headlines from the news are {results}."
     except Exception as e:
         import traceback
         traceback.print_exc()                        # dumps full stack to your logs
-        return f"Error fetching news headlines: {e}"
+        return f"Error fetching the news headlines: {e}."
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: