Real talk: most teams build containment rings around individual agents. Good start. But when agents communicate with each other, the channel between them is a trust boundary. Most teams treat it as internal. That is the structural error OWASP called out in ASI07 and ASI08. One compromised agent does not just fail. It passes corrupted outputs to every downstream agent that trusts it. The failure propagates through the system as valid data. The fix is not exotic. Apply the same four containment rings at every agent-to-agent boundary, not just at the system perimeter. Zero-trust between internal agents. Circuit breakers on every channel. Fan-out caps to limit blast radius. Memory isolation with provenance tracking. The interior boundaries between your agents have the same attack surface as the exterior ones. New post on the mechanics and the mitigations.
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