Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with an output schema and an unrelated sibling, this description is nearly complete: it covers purpose, outputs, input limits, and supported language values. It could be slightly stronger by mentioning usage exclusions or any special response interpretation, but nothing essential for invoking the tool is missing.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.