Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description is the main behavioral disclosure. It communicates the operation is a lookup (read-only), and explicitly covers the success return fields and the NotFound outcome. It does not mention auth or error details, but the core behavioral contract is clearly stated.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.