Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, conveying that this is a safe, read-only operation. The description adds no additional behavioral context such as return format, authentication needs, or potential variability (openWorldHint). Thus, it provides no value beyond the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.