Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
An output schema exists, so return values need not be explained, and the description covers permissions, the account prerequisite, and the home-country invariant. However, for a tool annotated as destructive with an opaque free-form parameter, it never states what state is lost or whether changes are reversible, leaving the riskiest aspect undocumented.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.