Update app.py

app.py

@@ -14,6 +14,10 @@ def my_custom_tool(query:str)-> str: #it's import to specify the return type
     """A tool that performs a search using DuckDuckGo
     Args:
         query: A string representing the search query
+
+    Returns:
+        str: A summary of formatted search results including references : titles, URLs
+
     """
     return search_tool.search(query)