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 adds one genuinely useful trait—'Page content is not stored'—and specifies the exact output (host, scheme, HTTP status). However, it does not disclose whether the tool makes a network request, redirect behavior, failure modes, or whether the json and zone parameters imply additional side effects.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.