Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations already declare readOnlyHint true, openWorldHint false, and destructiveHint false, so the safety profile is covered. The description adds meaningful behavioral context by saying it gathers six related data classes and reports what changed relative to the person's last view; it stops short of permissions, rate limits, or pagination details, which are less critical here.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.