Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given a simple read-only list tool, rich annotations, a fully described schema, and an existing output schema, nothing essential is missing. The workspace scope, limit behavior, and truncation indicator are communicated. The agent has enough to successfully call and interpret the tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.