FAIL

Straight from the horse’s mouth:

Insert smart chips & building blocks in your Google Doc
Insert smart chips in your Google Doc to include information about:

Other users with Gmail or Workspace email addresses
Other Google Docs, Sheets, or Slides files
Dates or Google Calendar events
Places and map directions

Where there’s a smart chip in your document, you and other users can hover or click on a chip to get more information.

If you are dealing with confidential information you should stop using Google Sheets immediately.

• There is no way to disable them.
• Google will insist on forwarding or sharing the resource with people within the organization even if do not need access to it.
• The changes are not reversible via Undo functionality. You have to revert to a previous version of the file (File -> Version History -> See Version History). Good luck to you if you’ve been working on the file for hours/days and google shits all over your file.
• What happens when google kills the feature because no one is using it? The original data that was kept in those cells is gone.

This is particularly important if you’re dealing with FERPA or HIPAA data. Switch to excel, which is what you should’ve done from the beginning.