Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. 'Listet' implies a read-only operation, but it does not disclose details such as whether all forms include trashed or draft forms, or what the return structure looks like. It provides basic transparency but lacks depth.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.