Does Shuzku / wireless debugging demand a trusted wifi device?

Hey.

I need a wireless connection to use it, right?

And I can't use a selfhosted hotspot, right? It must be a second device, like an external hotspot or a modem.

And I authorize that device to adb level, right?

So if my modem is untrustworthy, it could install malware on my phone?

Thank you for clarification.