Update app.py

app.py

@@ -42,7 +42,7 @@ def my_custom_tool(arg1:str, arg2:int)-> str: #it's important to specify the ret
     return "What magic will you build ?"
 
 @tool
-def fetch_active_crypto()-> str: #it's important to specify the return type
+def fetch_active_crypto()-> dict[str, int]: #it's important to specify the return type
     #Keep this format for the description / args / args description but feel free to modify the tool
     """A tool that fetches all active crypto by market cap in USD 
     """
@@ -63,7 +63,7 @@ def fetch_active_crypto()-> str: #it's important to specify the return type
     try:
       response = session.get(url, params=parameters)
       data = json.loads(response.text)
-      return str(top_10_items_from_json(data))
+      return top_10_items_from_json(data)
     except (ConnectionError, Timeout, TooManyRedirects) as e:
       return e