Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, so the safety profile is fully covered structurally. The description adds nothing beyond this - no note on permanence, whether deletion can be undone, or side effects on slide ordering - so it earns no credit above the annotation baseline.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.