Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a write-mutation tool with zero safety annotations, the description covers everything an agent needs to invoke it correctly: purpose, slide input structure, the confirmation gate, and write-location permissions. Only minor gaps remain (overwrite behavior, .pptx extension handling), which don't block correct use.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.