Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It only implies a read operation via 'Retrieve' but omits permissions, rate limits, return format, pagination, or whether bookmarks are user-specific, providing minimal transparency beyond the obvious.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.