Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple list operation with one optional parameter, an output schema, and strong annotations, the description covers the necessary context: purpose, auth requirement, and a usage caveat. It lacks explicit pagination/ordering details, but the output schema and simple nature make it adequate.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.