Update app.py

updated the description

app.py

@@ -21,9 +21,9 @@ def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return
 @tool
 def get_weather(city:str)-> str: #it's import to specify the return type
     """ A tool to Fetch weather of a given city
-         Args: 
-            city: name of the city (string)
-         returns: weather information of the City as string.        
+    Args: 
+        city: name of the city (string)
+    returns: weather information of the City as string.        
     """
     if not city or city.strip() == "":
         return "No Data Found"