Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It explicitly says 'GET', implying a safe read-only operation, but it does not mention potential edge cases (e.g., GPU not available), units of measurement, or whether any setup is required. This is adequate for a simple query tool but not rich.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.