I import new books into a separate physical library, remove the dross, make sure author and title are
correct, then move the books to the main library, and apply my own tags etc.
You might want to have a look at this add-on ==>>
QuarantineAndScrub
I also have a separate column for administrative purposes such as
read,
needs editing,
convert to PDF. I use the built in tags column strictly for content classification.
BR