Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given zero parameters, no output schema, and no annotations, the description reasonably covers the tool's purpose. It lists what the user gets (products, criteria, prices). However, it could mention if the list is exhaustive or if there is any filtering, but for a simple catalog listing, it is sufficiently complete.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.