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_info_by_user_id", "description": "Fetch Instagram user information by user ID using the RapidAPI service.", "parameters": {"is_id": {"description": "The Instagram user ID for which the information is to be fetched.", "type": "int", "default": "18527"}}}, {"name": "music_info", "description": "Retrieve music information using a given music ID from the TikTok API.", "parameters": {"music_id": {"description": "The ID of the music track to retrieve information for.", "type": "str", "default": "6761543137128089601"}}}, {"name": "user_follower", "description": "Retrieves the followers of a specified TikTok user using the provided API key.", "parameters": {"user_id": {"description": "The unique identifier of the TikTok user whose followers are to be retrieved.", "type": "str", "default": "107955"}, "count": {"description": "The number of followers to retrieve. Default is None.", "type": "str, optional", "default": ""}, "cursor": {"description": "The cursor for pagination (to fetch the next set of followers). Default is None.", "type": "str, optional", "default": ""}}}, {"name": "user_by_id", "description": "Fetches user information by user ID from the Instagram API.", "parameters": {"is_id": {"description": "The ID of the user to fetch information for.", "type": "str", "default": ""}}}]
Fetch the first 50 followers of the TikTok user with ID 'user789' and the details of the Instagram user with ID 333222111.
user
assistant
[{"name": "user_follower", "arguments": {"user_id": "user789", "count": "50"}}, {"name": "get_user_info_by_user_id", "arguments": {"is_id": 333222111}}]