If you know then why do you need to be asked? A sandbox includes what you know you need in it, no more, no less.
replyWith Codex it runs in a sandbox by default.
replyAs we just discussed, obviously you are likely to need internet access at some point.
The agent can decide whether it believes it needs to go outside of the sandbox and trigger a prompt.
This way you could have it sandboxed most of the time, but still allow access outside of the sandbox when you know the operation requires it.