Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is known. The description adds context about the scope (locally archived) and the output (attachment IDs), which is useful beyond annotations. However, it does not disclose any behavioral nuances such as pagination, sorting, or the effect of the 'verbose' parameter, so it is adequate but not rich.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.