Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with no parameters, no output schema, and a straightforward purpose, the description is largely complete. It specifies exactly what information is returned (key, label, type, required, help text, options) and how to use it. It does not mention pagination or list structure, but given the simplicity, these are minor gaps. The description sufficiently equips an agent to call the tool correctly.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.