Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a single-parameter tool with annotations covering safety, the description is sufficient: it explains what it does, why it's useful, and the resulting state. It doesn't cover edge cases like the agent not being archived, but that is a minor gap given the tool's simplicity.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.