I completely agree that raw local installs are terrifying regarding prompt injection. That’s actually why I stopped trying to self-host and started looking into PAIO (Personal AI Operator). It seems designed to act as that missing 'security layer' you’re asking for—effectively a firewall between the LLM and your actual data.
Since it uses a BYOK (Bring Your Own Key) architecture, you keep control, but the platform handles the 'one-click' integration security so you aren't manually fighting prompt injection vectors on a VPS. It feels like the only way to safely connect a real Gmail account without being the 'crazy' person giving root access to a stochastic model.
Has anyone else found a way to sandbox the Gmail permissions without needing a full burner identity, or is a managed gateway like PAIO the only real option right now?