> For the complete documentation index, see [llms.txt](https://handbook.harmonic.security/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://handbook.harmonic.security/ai-security-handbook.md).

# AI Security Handbook

Harmonic Security’s practical AI security handbook for governing AI tools, agents, MCP, data protection, runtime controls, and incident response.

*Last reviewed: August 18, 2026*

Published and maintained by [Harmonic Security](https://www.harmonic.security/), this handbook gives security teams practical, source-backed guidance for governing AI tools, agents, MCP servers, data, and runtime controls.

## Most popular articles and tools

<table data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><h3><i class="fa-box" style="color:$primary;">:box:</i></h3></td><td><strong>What is an AI sandbox</strong></td><td>Internal handbook article on what sandboxes control, where they stop, and how to test the boundary.</td><td><a href="/handbook/3.-runtime-sandbox-and-autonomy/3.1-what-even-is-an-ai-sandbox.md">3.1 What Even is an AI Sandbox?</a></td></tr><tr><td><h3><i class="fa-route" style="color:$primary;">:route:</i></h3></td><td><strong>Navigating OTel</strong></td><td>Internal handbook article on AI runtime visibility, telemetry pipelines, redaction, and investigations.</td><td><a href="/handbook/6.-observability-audit-and-evidence/6.2-opentelemetry-for-ai-runtime-visibility.md">6.2 OpenTelemetry for AI runtime visibility</a></td></tr><tr><td><h3><i class="fa-code-branch" style="color:$primary;">:code-branch:</i></h3></td><td><strong>Navigating Hooks</strong></td><td>Internal handbook article on lifecycle hooks, control points, logging, and supply-chain risk.</td><td><a href="/handbook/2.-supply-chain-and-extensibility/2.6-ai-hooks-inference-controls-and-lifecycle-automation.md">2.6 AI hooks: inference controls and lifecycle automation</a></td></tr><tr><td><h3><i class="fa-arrow-up-right-from-square" style="color:$primary;">:arrow-up-right-from-square:</i></h3></td><td><strong>Auditing your Claude</strong></td><td>External resource: open-source tool for inspecting Claude Desktop usage and local configuration risk.</td><td><a href="https://github.com/HarmonicSecurity/claudit-sec">https://github.com/HarmonicSecurity/claudit-sec</a></td></tr><tr><td><h3><i class="fa-arrow-up-right-from-square" style="color:$primary;">:arrow-up-right-from-square:</i></h3></td><td><strong>Securing ChatGPT Work</strong></td><td>External resource: practitioner guide for managed rollout, data controls, sandboxing, and evidence.</td><td><a href="https://www.harmonic.security/resources/securing-chatgpt-work-a-practitioners-guide">https://www.harmonic.security/resources/securing-chatgpt-work-a-practitioners-guide</a></td></tr><tr><td><h3><i class="fa-arrow-up-right-from-square" style="color:$primary;">:arrow-up-right-from-square:</i></h3></td><td><strong>Securing Cowork</strong></td><td>External resource: practitioner guide to Claude Cowork controls, OTel, prompts, connectors, and rollout.</td><td><a href="https://www.harmonic.security/resources/securing-claude-cowork-a-security-practitioners-guide">https://www.harmonic.security/resources/securing-claude-cowork-a-security-practitioners-guide</a></td></tr></tbody></table>

## Maintained vendor coverage

The product profiles currently maintained in this handbook cover Anthropic and OpenAI. Other vendors should remain outside the published navigation until their profiles contain current, source-backed security configuration guidance.

## Related handbook guidance

* [What is AI Security?](/start-here/what-is-ai-security.md)
* [How to Use This Handbook](/start-here/how-to-use-this-handbook.md)
* [7.4 The vendor-neutral control matrix](/handbook/7.-rollout-and-operations/7.4-the-vendor-neutral-control-matrix.md)
* [Glossary](/start-here/glossary.md)


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