Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false. The description adds no behavioral context—no mention of authentication requirements, rate limits, scoping, or response behavior. With annotations present, the description's burden is lower, but it still contributes nothing beyond what is already structured.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.