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": "find_longest_word", "description": "Finds the longest word in a list of words.", "parameters": {"words": {"description": "A list of words.", "type": "List[str]"}}}, {"name": "count_vowels", "description": "Counts the number of vowels in a given text.", "parameters": {"text": {"description": "The input text.", "type": "str"}}}]
Find the longest word in a list of common English words: ['the', 'quick', 'brown', 'fox'].
user
assistant
[{"name": "find_longest_word", "arguments": {"words": ["the", "quick", "brown", "fox"]}}]