Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare read-only, non-destructive, and open-world behavior. The description adds useful beyond-annotation context: the returned analytics and a per-call price of 0.010 USDC, though it does not explain payment mechanics or rate limits.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.