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": "find_files", "description": "Finds all files with a specific extension in a directory and its subdirectories.", "parameters": {"directory": {"description": "The directory to search in.", "type": "str"}, "extension": {"description": "The file extension to search for.", "type": "str"}}}, {"name": "is_valid_parentheses", "description": "Checks if a string contains valid parentheses.", "parameters": {"s": {"description": "The input string.", "type": "str"}}}]
What is the longest word in the list ['cat', 'dog', 'elephant', 'fox', 'giraffe'] and are the parentheses valid in the string '([[hello]]world)'?
user
assistant
[{"name": "find_longest_word", "arguments": {"words": ["cat", "dog", "elephant", "fox", "giraffe"]}}, {"name": "is_valid_parentheses", "arguments": {"s": "([[hello]]world)"}}]