Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description must carry the full burden. It discloses that the page content is included in the response, which is a key behavioral trait. However, it does not mention error behavior, authentication requirements, or whether only content or also metadata is returned, leaving some behavior unspecified.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.