Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, idempotentHint=false, destructiveHint=false, and openWorldHint=true, so the safety profile is covered; the description adds nothing beyond that. Worse, "viewed or edited" blurs read and write semantics for an endpoint that is purely a mutation, and it says nothing about which fields are affected or whether omitted fields are preserved (the defining trait of a partial update).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.