Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, and openWorldHint=false, so the safety profile is covered. The description adds useful context the annotations cannot: that the response enumerates the exact fields to ask the customer, their types/options, the pricing flow, and the follow-up steps. With no output schema, this return-shape disclosure carries real weight.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.