Sandboxes are not enough but you can have more observability into what the agent is doing, only give it access to read-only data and let it take irreversible actions that you can recover from. Here are some tips from building sandboxed multi-tenant version of Openclaw, my startup: https://github.com/lobu-ai/lobu

1. Don't let it send emails from your personal account, only let it draft email and share the link with you.

2. Use incremental snapshots and if agent bricks itself (often does with Openclaw if you give it access to change config) just do /revert to last snapshot. I use VolumeSnapshot for lobu.ai.

3. Don't let your agents see any secret. Swap the placeholder secrets at your gateway and put human in the loop for secrets you care about.

4. Don't let your agents have outbound network directly. It should only talk to your proxy which has strict whitelisted domains. There will be cases the agent needs to talk to different domains and I use time-box limits. (Only allow certain domains for current session 5 minutes and at the end of the session look up all the URLs it accessed.) You can also use tool hooks to audit the calls with LLM to make sure that's not triggered via a prompt injection attack.

Last but last least, use proper VMs like Kata Containers and Firecrackers.