Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
This is a complete description: it covers purpose, cost, auth, per-call limits, alternatives, prerequisite estimation, and a detailed return schema. With an output schema also present, the description goes beyond the minimum and anticipates agent needs, leaving no critical gaps for a paid, multi-step tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.