One vocabulary for every knob catalogue in the SDK — map styling and any module that describes its display as knobs draw from the same set, so an agent that learned one catalogue can read the other.
toggle: true/false, e.g. whether an overlay is drawn.factor: a multiplier over what the style already does (1 = unchanged).number: an absolute number with a range.color: a CSS colour string.enum: one of the knob's options.
The kind of value a display knob takes.