Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the output schema, full parameter coverage, and annotations, the description is nearly complete: it identifies the input groups, side-effect boundaries, and next action. Explicitly naming or contrasting with prepare_diagnostic_summary would make it fully complete, but the current content is sufficient for correct invocation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.