Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
With no annotations, no output schema, and no parameter structure, the description is the sole source of information, and it is grossly insufficient. The agent cannot learn what 'live Blender API operator/type metadata surface' means, what will be reported, or how this differs from the many sibling tools. Completely inadequate for any operational use.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.