DeFi total-value-locked (TVL) metrics via DefiLlama. With no params, returns the top protocols by TVL (name, slug, category, TVL, 1-day and 7-day % change, chains) plus total DeFi TVL across all chains. Pass protocol=<slug> (e.g. lido, aave, uniswap) for a single protocol's TVL, category, momentum, and chains; or chain=<name> (e.g. ethereum, solana, arbitrum) for that chain's TVL. Distinct from crypto.markets/token-price (spot prices) — this is protocol- and chain-level capital locked in DeFi, which an agent can't know from training. Free, keyless.