Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given one parameter, no output schema, and annotations covering safety, the description is largely complete. It explains the purpose and immediate effects. Missing details like whether the operation can be reversed or the return value, but these are not critical for an idempotent close action.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.