Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With all annotations false, the description carries the full behavioral disclosure burden. It reveals asynchronous reply timing, business-hours availability, direct delivery to the renter, the risk of polling-only answers being stranded, rate limiting, and the fact that answers are point-in-time facts. This is substantial and actionable transparency beyond the schema.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.