Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, destructiveHint=false, idempotentHint=false and openWorldHint=true, so safety basics are covered. The description adds nothing beyond that: it does not say whether the current token is invalidated, whether authentication is required, or what happens on repeat calls (relevant given idempotentHint=false).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.