My client has a third-party accessibility tool built into their website. This tool (ReciteMe) helps dyslexic and visually-impaired users adapt the content on the website to make it more accessible.
Features include a screen reader, a translation widget and a toolbar to change a website’s styling.
I’m not familiar with this exact platform, but similar ones typically just process the HTML on the page. Answers is no different from a regular website in that way, so I wouldn’t anticipate any issues there (to be certain, you’d need to fully try it out).
My larger concern would be with a client-hosted implementation (and the outer technology communicating with an iframe). I got in touch with someone from the Recite team, it turns out they do have specific steps for iframe’d content – see page 6 here.
As the site is built, I’d recommend following said guide. At that point, you should be able to confirm for certain that the recite toolbar is able to interact with Answers.