Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with 4 parameters, no annotations, no output schema, and no required parameters, the description is incomplete. An agent cannot determine how url, host, json, and zone relate, whether they are alternatives or combinations, or what the exact return format is. The description covers only the url-input case.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.