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": "headphones", "description": "This function retrieves information about headphones from the Amazon API using optional brand filtering.", "parameters": {"name_brand": {"description": "The brand name to filter headphones by. Defaults to None.", "type": "str, optional", "default": ""}}}, {"name": "details", "description": "Gets the details and general information of a creator using their `creator_id`.", "parameters": {"creator_id": {"description": "The unique identifier of the creator. This can be obtained using the `/search` endpoint.", "type": "int", "default": "2416483"}}}]
Who is the creator with ID 456123789?
user
assistant
[{"name": "details", "arguments": {"creator_id": 456123789}}]