Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden. It describes the return format and lists columns, but does not disclose whether the tool is read-only, requires authentication, or has rate limits. As a query tool, basic safety is inferred but not explicitly stated.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.