Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with six parameters, an output schema, and annotations covering safety, the description covers all necessary context: scope, freshness semantics, permission, and the sibling alternative. The output schema presumably handles return value details, so nothing critical is missing. The description is complete and self-sufficient.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.