
AI
May 30, 2026
6 min read
Pattern: The Tool Privilege Broker
Your agent's system prompt is not a security control. A deterministic policy boundary between model reasoning and tool execution, with runnable code.
All the articles I've posted.

Your agent's system prompt is not a security control. A deterministic policy boundary between model reasoning and tool execution, with runnable code.

Giving an AI agent a service account makes authorization a prompt-engineering problem. Fix it with OAuth token exchange โ runnable code included.

Framework choice barely matters. The harness and governance layers decide whether an AI agent survives production โ with 18 runnable, tested patterns.