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 only states 'Get' which implies a read operation, but does not disclose return format, error behavior (e.g., 404 when not found), or any side effects. This is minimal transparency for a retrieval tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.