CLIP Interrogator[1], which is also build into AUTOMATIC1111, gives quite reasonable results, at least if all you need is a prompt, it can't handle complex interactions:

Image: https://i.imgur.com/husplYZ.png

Output: "a white horse with a sign that says rexel's in space, pixelperfect, inspired by Paul Kelpe, official simpsons movie artwork, alternate album cover, in style of nanospace, by Apelles, pickles, pespective, pop surrealism, ingame, in a space cadet outfit, sifi"

[1] https://huggingface.co/spaces/pharma/CLIP-Interrogator