Probably dodged a bullet there anyway, if they weren't even willing to create a basic job description for the role. It's not like it's that hard to write one; you could pretty easily just find a template online and replace relevant keywords.
The HR lady in question had since left the company.
I kid you not, I later found her in a newspaper article where she was asking advice on her new startup business venture proposal - a clothes shop where people try clothes on and then order online. They included a picture of her in and her business partner in the write-up, but the response the editor provided her was she needed to better understand the risks (understatement of the year).
Why do companies allow these people in such positions, I have no idea.