Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the low complexity (single required parameter, no output schema, simple operation), the description is sufficiently complete. It explains the parameter unit and the core action, which is adequate for a cursor positioning tool, though edge case behavior (e.g., negative values) is not specified.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.