The original title is "Build a Basic AI Agent From Scratch: Security III"

Short summary

This tutorial completes a multi-part series on building a secure AI agent from scratch, focusing on hardening the tool policy gate with path scoping, shell denylists, and SSRF guards. It also covers enforcing resource and cost limits, scrubbing secrets from the container environment, and adding audit logging with a kill switch. Code examples show how to implement each defense layer before tool execution reaches Docker.

• •Three-layer tool policy gate: path scoping, shell denylist, SSRF guard
• •Resource/cost limits and secret scrubbing for sandboxed agent containers
• •Audit logging and kill switch for session-level control

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