Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity, full schema description coverage, and the existence of an output schema, the description is complete enough for an agent to call it correctly. It covers the core purpose, optional filter, restricted-scope behavior, fallback behavior, and return format.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.