Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
The tool has low complexity (one parameter, no nested objects, output schema exists). The description covers the input format, return fields, an explicit exclusion (pricing), and the fail-closed behavior for unverified stores. Given the output schema is present and the tool is simple, this is a complete description that leaves no meaningful gaps.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.