Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a creation tool with an output schema, return values need not be explained; the description instead covers the crucial timing, side effects, undo window, and destination resolution. The one remaining hole is folderId and the 'name' parameter, which are undocumented in both schema and description.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.