Update app.py

app.py

@@ -21,16 +21,13 @@ 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_calories(meal:str) -> Union[str, None]:
+def get_calories(meal:str) -> str:
     """
-    Retrieves the calorie information for a given meal from the OpenFoodFacts API.
+    Retrieves the calorie information per 100g for a given meal from the OpenFoodFacts API.
 
     Args:
         meal: The argument that describes the name or description of the meal to search for.
 
-    Returns:
-        Union: The calorie information as a string in the format 'X kcal per 100g',
-                          'No data found' if no information is available, or None if the request fails.
     """
     search_url = "https://world.openfoodfacts.org/cgi/search.pl"
     params = {