Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, so safety and external reach are covered. The description adds that results use the shared Job shape, which is useful context, but says nothing about pagination, rate limits, or result size for a board listing.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.