Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the single optional parameter, rich schema, and annotations, the description is fully complete for invocation. It covers what happens with omission, unknown topics, aliases, unsupported values, and how to treat the response. The output schema exists, so return-value details are not required here.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.