Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given that the tool has an output schema, all parameters are fully described, and the description covers use cases, prerequisites, and output semantics, everything an agent needs to select and invoke the tool correctly is present. The tool is a simple read-style operation; no additional context is missing.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.