Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It states the tool is a snapshot (read-only, non-destructive) and lists the specific data returned: counts, counts by work mode, and occupations. This is sufficient transparency for a simple aggregation tool, though it could mention any limitations or performance characteristics.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.