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 known. The description adds zero behavioral context beyond that — nothing about permissions, side effects, name uniqueness, or whether creation is scoped to an organization.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.