Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnly, idempotent, openWorld and non-destructive, so the safety profile is covered. The description adds a genuine behavioral trait beyond that: omitting either parameter returns the next question to ask the customer, revealing a conversational fallback mode. It does not describe return payload shape, but an output schema exists.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.