Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given there is an output schema, the description doesn't need to detail return values, but it still summarizes what is returned (deploy count, failed count, repositories, team totals). For a single-parameter read-only tool with annotations and output schema, this is nearly complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.