We want to guarantee that anyone who starts a jitsi widget from within a deployed versioned build of the Riot client knows who is hosting that jitsi instance.
Some of the existing widget warnings might well be enough for this purpose.
Voice / video call buttons never have and do not currently show prompts
Jitsi widgets do trigger a prompt in web, but it talks about sharing data with Riot (because it hosts the widget wrapper), not the underlying Jitsi host:
We want to guarantee that anyone who starts a jitsi widget from within a deployed versioned build of the Riot client knows who is hosting that jitsi instance.
Some of the existing widget warnings might well be enough for this purpose.