The original title is "Beyond System Prompts: Enforcing Policy & Action Boundaries in Enterprise AI Agents"

Short summary

System prompts are advisory, not security controls—enterprise AI agents need deterministic runtime gateways to enforce policy. The author proposes a four-tier risk classification (read-only, reversible writes, external comms, irreversible) with schema validation, OPA/CEL policy engines, and HITL circuit breakers for critical actions. This addresses OWASP LLM08 (Excessive Agency) by moving governance out of the prompt window and into the execution perimeter.

• •Prompt-based guardrails fail under context pressure and adversarial injection
• •Four-tier action risk framework from read-only to irreversible with escalating controls
• •Deterministic policy engines (OPA/CEL) and schema validation replace probabilistic self-limiting

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