Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations and no output schema, the description carries the burden and largely meets it by enumerating the returned fields (columns, numeric classification, row count, provenance banner). It is implicitly a read-only inspection call with no parameters, so there is little risk surface left undisclosed, though permissions or caching behavior are unmentioned.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.