I think at the end of the day, the right conclusion is that an image is exemplary of the process used to create it. If you agree with that, then I hope you'll consider including information about the process along with the image. Without that context, I don't think you can reasonably attribute a "look" to the film itself. Minimally, I think you'd need to know:

A) What's the film format/size?

B) Was it shot and processed normally? (i.e. not pushed, pulled, cross-processed, or developed with a staining developer)

C) Is this image a scan of a negative or a scan of a print?