Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so safety is fully covered. The description adds nothing beyond that: no note on what happens for a missing policy (error vs. empty), no permission requirements, and no mention of the operator-namespace variant that the sibling suggests.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.