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 implies a read-only retrieval of confirmation codes but does not disclose authentication needs, whether messages are marked read, return format, or rate limits. Only a hint of content channels is added.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.