Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the presence of a rich input schema, output schema, and annotations, the description covers the essential behavioral nuance (atomicity) without duplicating structured information. It could theoretically mention that only changed documents need to be included, but the updates property description already covers that, so nothing critical is missing.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.