Tooltips should be used to show supplementary information only. They can be triggered when the user hovers over an element, say an info sprinkle or button.

For screens, or lists that would require many info sprinkles, consider using the inline definition pattern.

Never nest call to actions within tooltips. The behavior of mousing over something and then mousing over a link is unexpected and doesn’t meet accessibility best practices. (You’re hiding the link). Instead, opt for showing the link somewhere else on the UI.

Instead consider placing the link near a title or the element that needs further context.