Will there be a screen reader tool within the digital AP Exam?

No. Students who use screen reading software (such as JAWS, NVDA) can use it with the digital exam. Students who do not use screen reading software, will use the text-to-speech technology on their device. This isn’t a tool within Bluebook, but rather a built-in screen reader and text-to-speech tool in their device that they would use when online. See the AP Assistive Technology Configuration Instructions for more details.