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 but action-oriented tool (clicking can trigger navigation or errors), the description is incomplete. It lacks context on prerequisites (e.g., page must be loaded), error handling, behavioral traits (e.g., waiting), or output expectations. For a tool with potential side effects, this is inadequate.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.