Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are present, so the description carries the full burden. It states the action but does not disclose whether generating a boleto has side effects (e.g., issuing a payment slip, modifying status), what the output format is, or whether it is idempotent. This leaves uncertainty about side effects and safety.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.