Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple one-parameter tool with an output schema present, the description covers purpose, target endpoints, cost, and reuse guidance. It could briefly distinguish itself from sibling name-to-id tools, but that is a minor omission and does not materially hinder correct invocation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.