Network policies controlling egress would be one thing. I haven't seen how you make secrets available to the agent, but I would imagine you would need to proxy calls through a mitm proxy to replace tokens with real secrets, or some other way to make sure the agent cannot access the secrets themselves. Specifically for an agent that works with code, I could imagine being able to run docker-in-docker will probably be requested at some point, which means you'll need gvisor or something.