Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given no annotations, no output schema, and a simple one-parameter schema, the description should ideally clarify navigation context, such as whether it sets the active page or just scrolls. The current description is too thin to fully disambiguate from zoom_to_page or view_document, leaving the agent uncertain about the tool's exact behavior.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.