Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, non-destructive and non-open-world, so the safety profile is fully covered structurally. The description adds essentially nothing behavioral beyond the schema's keyword parameter: no pagination or result-size behavior, no notice that it is scoped to a single project, no mention of the id-lookup shortcut for numeric keywords.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.