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": "vimeo", "description": "Checks if a given Vimeo username is available using the Toolbench RapidAPI service.", "parameters": {"username": {"description": "The Vimeo username to check for availability.", "type": "str", "default": "username"}}}, {"name": "get_user_pins", "description": "Retrieves the Pinterest pins of a specified user.", "parameters": {"username": {"description": "The Pinterest username whose pins are to be fetched.", "type": "str", "default": "0869178429hau"}}}]
Check if the Vimeo username 'john_doe_artist' is available.
user
assistant
[{"name": "vimeo", "arguments": {"username": "john_doe_artist"}}]