Only you can tell if they get your story across, but they do indeed get A story across. I think it can be improved upon, however.

The phrase “at risk of possession” sounds ambiguous, and telling us she escapes is pretty much reducing the conflict before it exists. I think you have a foundation of intriguing conflcit by your protag being stuck in an asylum only to find out the person she trusts most is her “true enemy”.

“Questionable psychic visions land a paranoid mother (some type of description of protag) in a haunted asylum where she believes that her psychiatrist is actually the one trying to kill her.”

I’m curious as to the title you have for this project. I love these stories- I’d see it!