Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds one behavioral detail beyond annotations: private spaces require membership. That is useful auth context, but it does not address open-world behavior, missing resources, or any other operational nuance, so the additional value is moderate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.