Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description adds useful behavioral context by stating that the tool returns full markdown source for a single page. The readOnlyHint=true annotation already covers the safety profile, so the description does not need to repeat that. No details about error behavior or missing paths are provided, though the output schema likely covers the return shape.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.