Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the burden of behavioral disclosure. It does reveal pay-per-use cost (20.0 USDC on Base) and frames the output as fresh data for retail pricing/assortment decisions. However, it does not disclose whether the call is read-only, how results are returned, or any rate/usage constraints beyond cost.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.