Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Bevel is a mesh operation with substantial complexity (affecting geometry, requiring selection, producing new geometry). With no description, no annotations, and no parameter documentation, the tool is completely inadequate for an agent to call it correctly. The presence of an output schema does not help since its content is unknown.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.