Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, covering safety and idempotency. The description adds the useful qualifier 'current,' implying a point-in-time snapshot rather than historical data. It does not disclose return shape, pagination, or authorization needs, so it adds only modest value beyond annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.