Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden, but it only says 'Get,' which merely implies read-only behavior. It does not disclose response format, authorization needs, rate limits, or any additional operational traits beyond what the name itself already suggests.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.