Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's complexity (live web access, AI extraction, credit cost) and that an output schema exists, the description covers the key aspects: what it does, when to use, side effects, and constraints. It doesn't detail output fields, but the schema handles that.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.