Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description adds that the response includes a result URL, but says nothing about terminal vs in-progress states, polling cadence, or failure behavior for an async build.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.