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": "is_valid_email", "description": "Checks if an email address is valid.", "parameters": {"email": {"description": "The email address to validate.", "type": "str"}}}]
Are 'test@sub.domain.com', 'test@sub.domain', 'test@sub', 'test@sub.' valid?
user
assistant
[{"name": "is_valid_email", "arguments": {"email": "test@sub.domain.com"}}, {"name": "is_valid_email", "arguments": {"email": "test@sub.domain"}}, {"name": "is_valid_email", "arguments": {"email": "test@sub"}}, {"name": "is_valid_email", "arguments": {"email": "test@sub."}}]