accessibility, alt text and so on

Surfacing again after a few miserable days trying to bring consistency (just at layout level – there are limits!) to a set of Word files … and a reference I came across prompted me to try out the Accessibility report; it's also a current concern here, as we realise our products and their documentation need to be accessible to an increasing number of blind and partially-sighted users.

Two questions, then:

• what's the quickest way of getting some sort of accessibility report on a .book and its components? I've seen a 'Create accessible .pdf' option in Acrobat, but that's leaving it a bit late …
• starting with the basics, is there a way of adding alt text to referenced images in FM? I'm still on FM2012

Thanks in advance for any ideas on this.