According to the tooltip ARIA documentation (linked below), the tooltip should be the aria-describedby value for element that it targets. However, we currently default to aria-label. It could be confusing or unexpected if adding a tooltip to a control changes its label for screen readers.

References:

• https://www.w3.org/TR/wai-aria-1.1/#tooltip
• https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Roles/tooltip_role