We internally introduced some extended accessibility options in order to pass detailed information about a component to tools like screen readers. Each component has some dedicated interface to produce textual information that not only reflects the text behind the component, but also information about the component itself and its non-textual information. The accessibility options are switched on by passing a certain URL parameter.
Some examples (the information you read as tool-tip is the one which is interpreted by screen readers):
The text composition follows some rules which can be configured. – The extended accessibility options will be part of next update.