Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It only says it returns 'active high-intent visitors' but does not clarify how 'currently active' is defined, whether a site parameter is required, how the limit parameter affects results, or what the return format looks like. This is minimal transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.