Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity (one parameter, no output schema), the description is complete enough for basic invocation. It states the action clearly, and the schema covers the parameter. However, it lacks any caveats or prerequisites, potentially leaving room for errors, but for a simple on/off command this is generally acceptable.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.