Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool has an output schema (so description need not explain return values), only one required parameter, no enums, and annotations already cover read-only and open-world hints, the description is complete. It additionally provides ownership scope and cost/free status, which are not in the structured data.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.