Stand at the end of a galley, or in the open corner of an L-shaped kitchen, and take a level, horizontal photo that shows both the counters and the upper cabinets. Clear the counters as much as you can. If one photo cannot capture the whole room, take two from opposite ends and redesign each separately.
Pick a light style like Scandinavian or Minimalist and be specific about what stays: "keep the layout, window, and sink position, paint the cabinets soft white, replace the two upper cabinets on the left with oak open shelves, add under-cabinet lighting and a pale terrazzo-look backsplash." Clear instructions stop the AI from inventing an island that would never fit.
Generate two or three versions: one with all-white cabinets, one with a pale color, and one with open shelving. Compare which feels most open, then confirm that the shelf depths and appliance sizes you like actually fit your measurements before buying anything.