123 Toolkit for Chrome OS use and transfer to any other app of information received from Google APIs will adhere to Google API Services User Data Policy, including the Limited Use requirements.
See the Google Authorization window at the right, or in more simple and precise words:
View and manage your Chrome OS devices metadata
The add-on needs view access to the Google Chrome OS API to list all devices in the spreadsheet. The add-on is also able to wipe all users off the device or to powerwash the Chrome device, so it also needs access to manage your Chrome OS devices.
View and manage spreadsheets that this application has been installed in
Display and run third-party web content in prompts and sidebars inside Google applications