Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=true, and destructiveHint=false, so safety is covered. The description adds nothing beyond them: no statement of what data is returned, whether the result is static reference data or reflects live chain state, or what 'valid origins' means in practice. It does not contradict the annotations, but it contributes no behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.