Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the transparency burden. It explicitly discloses that the operation is read-only and that secrets are redacted by the API, which is meaningful behavioral context beyond the tool name. It does not detail response shape or error behavior, but for a zero-parameter read operation this is strong.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.