Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with only two parameters, a provided output schema, and clear annotations, the description covers the basic contract. However, it omits a hint that valid translator slugs might need to be discovered (e.g., via list-all-translations-tool) and does not specify behavior for missing text or invalid slug. Given the low complexity, the description is mostly complete but could be slightly stronger.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.