Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full behavioral burden. It indicates a read-only operation via 'Return' and adds the 'live on-chain' context, but it does not mention pagination, rate limits, or whether the feed includes unconfirmed transactions, so behavioral disclosure is minimal.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.