Google Drive
Google Drive. In the CLI, over MCP, however you work.
Find a document, read it, change it, and get it back as a PDF. Connected once, it answers the terminal and every assistant you already use, under one permission.
Drive has two levels: read what is there, or change it. Read finds a file, reads it as text and downloads it, and a PDF, a Word file or a spreadsheet reads too, because Google converts it on the way through. Manage adds writing, copying, the Trash and sharing, and a share stops and asks before it hands anything to anyone.