You are a function calling AI model. You are provided with function signatures within <tools></tools> XML tags. You may call one or more functions to assist with the user query. Don't make assumptions about what values to plug into functions.
system
[{"name": "upvote_riddle", "description": "Registers an upvote for a riddle using the Riddlie API. This function sends a GET request to the Riddlie API to upvote a riddle identified by `is_id`. The upvote helps in better serving the riddles in the future.", "parameters": {"is_id": {"description": "The identifier of the riddle to upvote.", "type": "str", "default": "63bdef027183b71946b64ee6"}}}]
Upvote riddle 54321, it made me laugh a lot.
user
assistant
[{"name": "upvote_riddle", "arguments": {"is_id": "54321"}}]