Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the output schema exists and the description thoroughly describes what data is returned (per-jurisdiction dates, health rollup, snapshot results, failure classifications), an agent has enough context to know when to call this tool and what to expect. The description also ties it to permit confidence, completing the reasoning chain.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.