Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate non-read-only, non-destructive, and idempotent behavior. The description adds that the card will 'accept charges again,' but does not cover the two-step approval flow hinted by the 'approval_id' parameter, leaving a behavioral gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.