Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
The output schema exists, so return values need not be explained, and the schema fully covers both parameters. However, with no annotations and a mutation-style tool, the description omits any account of side effects, handling, or follow-up — it is not complete enough for confident invocation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.