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 the safety profile is covered by structured data. The description adds nothing beyond that: it does not say which actions can be applied (delete? update fields?), whether effects are reversible, or that a payload selecting objects and action type is required. For a bulk mutation endpoint this leaves a real gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.