Keep in mind that OpenSCAD doesn't support exporting .step files. Ticket to add support has been open for a long time but it's a hard to implement.

https://github.com/CadQuery/cadquery is much more capable in that regards. It's based on more capable Open CASCADE Technology and Freecad also uses it.

As for use cases, the only viable use case I see is to ask it to make a model based on a picture. Or ask it to fix the topological error. In other cases it's much faster to model than to describe it to agent