Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description adds the specific calculation rules (e.g., 30-day basis for labor insurance, month-end attribution for health insurance) and the non-binding disclaimer. This adds some behavioral context beyond annotations, but given the strong annotation coverage, a score of 3 is appropriate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.