Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the transparency burden. 'Get' implies a read-only operation, adding basic safety context, but it omits details about error handling, authentication requirements, or response format. The minimal read-only implication justifies a mid-tier score.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.