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": "charts_chain", "description": "Retrieves the historical Total Value Locked (TVL) data for a specified blockchain chain.", "parameters": {"chain": {"description": "The slug identifier of the blockchain chain. This can be obtained from the /v1/tvl/chains endpoint or the chains property on /v1/tvl/protocols.", "type": "str", "default": "Ethereum"}}}, {"name": "supply_chain", "description": "Fetches supply chain information for a given stock ticker.", "parameters": {"ticker": {"description": "The stock symbol of the company to get supply chain information for.", "type": "str", "default": "IBM"}}}]
Can you provide the historical TVL data for Ethereum over the past year?
user
assistant
[{"name": "charts_chain", "arguments": {"chain": "ethereum"}}]