Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true and idempotentHint=true, so restating idempotency adds little. The one genuine addition is 'soft-delete', which tells the agent data is not physically purged, but the description leaves out whether the deck becomes inaccessible, whether shares/grants cascade, and whether there is any undo path.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.