The add-on requires the following permissions for it to operate.
See, edit, create, and delete all of your Google Drive files. This permission is required so that the add-on can read a Google Doc template file from Quicklution's Drive and make a copy of it into your Google Drive. The copy of this template will be the base for the generated phone book. The add-on will not see, edit, create or delete any other file in your Drive or any other Google Drive you have access to.
See, edit, create, and delete all your Google Docs documents. This permission is required so that the add-on can edit a newly created Google Doc which will become the phone book document required. The add-on will not see, edit, create or delete any other file in your Drive or any other Google Drive you have access to.
Run as a Gmail add-on. This permission is only required so that the add-on will show up from Gmail. It will not view your email messages.
See and download your contacts. This permission is required to read the list of labels in your contact list. This will allow you to download only contacts with a specific label rather than all the contacts in your list. Once the label is selected, contact data related to name, email, company, job title, address, phone, etc., are downloaded to generate a phone book document. This permission will not allow any modifications to existing contacts or inserting new contacts.
Display and run third-party web content in prompts and sidebars inside Google applications. This permission is required to display the About and Contact Us prompts. The About dialog shows more information about this product. The Contact Us dialog enables customers to contact support or submit suggestions.
Connect to an external service. This permission is required for logs and analysis purposes. It will help to improve the product.