It was a very basic "essay", only a few paragraphs if I remember right, answering an easy prompt. The goal was probably only to score technical writing ability

It was a very basic "essay", only a few paragraphs if I remember right, answering an easy prompt. The goal was probably only to score technical writing ability while disguising it as a normal essay assignment - it wasn't revealed that what you wrote would be graded by an algorithm until afterwards.