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": "order_by_descending", "description": "Fetches a list of resources from the Cat Breed Database API sorted in descending order based on the provided ordering parameter.", "parameters": {"ordering": {"description": "The criterion by which to sort the list in descending order.", "type": "str", "default": "-breedName"}}}, {"name": "difficulty", "description": "Fetches weed strain information based on the difficulty of growing (easy, medium, or difficult).", "parameters": {"difficulty": {"description": "The difficulty level of growing the strain. Acceptable values are 'easy', 'medium', or 'difficult'.", "type": "str", "default": "medium"}}}]
Find information on weed strains known to be difficult to grow.
user
assistant
[{"name": "difficulty", "arguments": {"difficulty": "difficult"}}]