I do use Android, and I have no idea what the article is talking about, and AFAIK, I have never seen a toast when the clipboard is accessed.

Even if I say something like "maybe the on-screen keyboard is exempt?" and say, open Firefox, and use the in-Firefox option of "Fill link from clipboard" instead of long-press & paste … no toasts?

(And yes, I'm after Android 12, this phone is new.)

Same here, also confused. I've only ever had Android phones (currently on Android 16) and I don't know what it means either. Pasting from the clipboard using a keyboard, an application action, or a context menu doesn't show a notification or toast. I tested it just now. The only system-level thing I see is a "Copied" toast, which is visible in the article's video.

Is this specific to particular Android versions or vendors? Curious if anyone can elaborate what we're supposed to see here.

edit: I will note that copying a password from a password manager showed it masked with asterisks in the keyboard's paste button.

Really? Never seen it? I guess nothing reads your clipboard but generally you should get a notification when an application accesses it.