Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with an output schema and clear annotations, the description covers the essential aspects: purpose, return values, side effects, and authentication. It could mention idempotency or behavior when no trace is active, but these are not critical given the output schema's detail.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.