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 description adds no safety information and does not contradict them. It also fails to disclose the behavior that matters most for a preview endpoint: that the result depends on the current state of the group and its linked objects, and that calling it again after changes may yield different output despite idempotentHint.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.