Don't Use Prompts to Govern Agents: Enforcement Belongs at the Tool Boundary
No-Conflict4823 · reddit · 2026-08-06
The author highlights a common pitfall in deploying AI agents: attempting to govern their behavior using system prompts. A prompt is essentially a 'request' rather than 'permission', and occasional model failures can lead to severe consequences.
Key insights:
- Enforcement Location: Security checks must reside at the tool boundary, hard-coded to physically block the endpoint, rather than relying on prompts that can be bypassed.
- Audit Trails: Every approval and execution must leave a persistent record to survive the session for legal or compliance audits.
- Accountability: The real reason agent pilots fail to ship isn't accuracy; it's the inability to answer 'who owns this specific agent action?'.
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