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": "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"}}}]
I need to see the pins of the user 'recipe_expert' who posts delicious food recipes on Pinterest.
user
assistant
[{"name": "get_user_pins", "arguments": {"username": "recipe_expert"}}]