Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It states the tool retrieves a reservation by ID, implying a read-only operation, but doesn't cover aspects like error handling (e.g., what happens if the ID is invalid), authentication needs, rate limits, or response format, which are critical for a tool with no structured safety hints.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.