Avoiding Unintended Public Sharing in Google Colab Notebooks

The default privacy setting for a new Colab notebook is private, but the sharing dialog offers an 'Anyone with the link' option that can be activated inadvertently. When a user clicks Copy link while the visibility is set to this mode, the notebook becomes accessible to anyone who obtains the URL, and the link remains active until the owner manually revokes it. This lack of a warning or automatic restriction can lead to accidental exposure, especially if the link is posted on public forums or indexed by search engines.

Given that Colab integrates with Google Drive, any change to the notebook’s visibility propagates to the underlying Drive file, meaning that a single accidental action can affect all collaborators. The goal is to identify design or programmatic solutions that would prevent or alert users to this risk.

Which UI element could be added to the sharing dialog to warn users before they copy a link when the notebook is set to 'Anyone with the link'? Does Colab provide an API that can enforce a 'Restricted' visibility state programmatically, thereby preventing accidental public exposure?