Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description must carry the burden of behavioral disclosure. It does disclose the inclusion of a national average and the two ordering modes, but it omits details such as default order/limit, data source, or whether the average changes with the limit parameter. This is a reasonable but incomplete transparency profile.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.