Is right way to show Tooltip on keyboard navigation?

1. How do I access tooltip on keyboard?
2. Should tooltips be hover or click?
3. Should Screen readers read tooltips?

How do I access tooltip on keyboard?

The tooltip widget can shown via keyboard focus or by the onmouse event. The tooltip widget can be hidden by removing focus from the text box or by moving the mouse off the textbox. The tooltip widget can be hidden by pressing the Escape key. The tooltip is only hidden via JavaScript and CSS selectors.

Should tooltips be hover or click?

A tooltip appears when the user hovers over a component or in-focus state. On mobile devices, the tooltip appears when a user clicks long on an element.

Should Screen readers read tooltips?

The tooltip must be operable using both keyboard only and screen readers (with a reasonable interplay of default keys like Tab , Enter / Space , Esc , Arrow keys), as well as mobile screen readers: Simple tooltips should be displayed automatically.