Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds that this is an 'overview' spanning invites/paper/planning progress, implying a read-only aggregate, but says nothing about auth requirements, scope, or whether it summarizes or returns raw lists.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.