This is a really cool library to look at even if you aren't running openclaw directly.
Lots of good concepts to seek inspiration from.
1. process-scoped egress policy
2. policy-as-code
3. explicit approval classes
4. normalized network/ guardrail receipts.
5. structured guardrail outcomes
6. centralized decision rules
Thanks! Don't forget wire level protocol parsing - this is important because agents usually can spawn subprocesses and if they have postgres credentials, you're just one psql call away from disaster if you only have MCP/HTTP proxies in place.