Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple list tool, the description provides the core purpose and a pagination detail, which covers the essential usage. However, with no output schema, it does not describe the structure of language objects, and it does not explain the PAT/PAK distinction beyond the schema's parameter description.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.