Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
While annotations already declare readOnlyHint, idempotentHint, and destructiveHint, the description adds valuable behavioral context: it returns a summary table (not full JSON), and it clarifies that workload deployments are excluded. This goes beyond the annotations, though it stops short of describing pagination or default limits, which are partially covered by the schema.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.