Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. It discloses key behavioral aspects: no login required for the agent, and the user completes payment by clicking the URL. This adds context beyond the schema, though it doesn't cover all potential side effects or response details.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.