...
Tooltips should appear adjacent to the mouse cursor. This is usually below and to the right of the cursor (except for with right-to-left languages, where the tooltip may appear to the left instead).
For validation tooltips see https://kanasoftware.jira.com/wiki/spaces/UserExp/pages/849479282/Field+Validation#Structure.
The tooltip should not move with the mouse cursor while it remains within the target area. See the Interaction section below.
The tooltip should not cover the element it relates to, which the user may need to interact with. For example:
...