Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate this is not read-only, so the write behavior is expected. The description adds useful context that it affects revenue attribution and warns against duplicate manual tracking for supported providers. However, it does not mention idempotency, duplicate-transaction handling, or other side effects.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.