Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add vinayaklatthe/microsoft-security-skills --skill defender-for-containersgit clone --depth 1 https://github.com/vinayaklatthe/microsoft-security-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/vinayaklatthe/microsoft-security-skills/defender-for-containers)<a href="https://agentmods.dev/skills/vinayaklatthe/microsoft-security-skills/defender-for-containers"><img src="https://agentmods.dev/badge/skills/vinayaklatthe/microsoft-security-skills/defender-for-containers/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/vinayaklatthe/microsoft-security-skills/defender-for-containers"><img src="https://agentmods.dev/badge/skills/vinayaklatthe/microsoft-security-skills/defender-for-containers.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00209 | $0.01911 |
| Opus 5 | $0.00105 | $0.00955 |
| Sonnet 5 | $0.00042 | $0.00382 |
| Haiku 4.5 | $0.00021 | $0.00191 |
Grade A, and why
defender-for-containers scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 128 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Microsoft Defender for Containers
Defender for Containers is the Kubernetes-aware plan in Microsoft Defender for Cloud. It covers AKS, Azure Arc-enabled Kubernetes (on-prem, EKS, GKE, OpenShift), and the container registries that feed them, providing posture, image vulnerability assessment, runtime threat detection, and admission control.
When to use
Securing Kubernetes clusters and the registries that supply them. Use this skill for plan rollout, sensor vs agentless trade-offs, registry scanning, admission policy design, and runtime alert response.
Do not use this skill for VM/host hardening (defender-for-servers), cluster
networking design (azure-network-security-design), or generic AKS operations (azure-kubernetes).
Capability map
| Capability | How it works | Coverage |
|---|---|---|
| Agentless discovery | API-based cluster inventory, control-plane misconfig, K8s API audit log analytics | AKS, EKS, GKE, Arc |
| Agentless vulnerability assessment | Snapshots node disks; scans images in registries and running containers | AKS, EKS, GKE |
| Registry scanning | Pull-time, push-time, and continuous scan of images | ACR, ECR, GAR |
| Runtime threat detection | Defender sensor (DaemonSet, eBPF on Linux) — fileless, lateral movement, crypto-miner detections | AKS, Arc, EKS, GKE |
| Kubernetes data plane hardening | Azure Policy add-on (OPA/Gatekeeper) | AKS, Arc-enabled K8s |
| Attack path analysis | Combines posture + vuln + runtime to surface internet → pod → cloud-IAM paths | All |
Approach
-
Enable Defender for Containers at subscription scope. Auto-provisioning installs:
- Defender sensor (DaemonSet) for runtime detection on Linux nodes.
- Azure Policy for Kubernetes add-on for admission control.
- Connects ACR scanning automatically.
Verify:
kubectl get ds -n kube-systemshowsmicrosoft-defender-collector-ds; AKS shows Defender profile = enabled.
-
Connect non-Azure clusters via Arc. EKS/GKE need a connector at the AWS/GCP cloud account level + Arc onboarding for runtime sensor (agentless features work without sensor).
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 128 lines · 209 tokens per session scan A a5bef605b8af
defender-for-containers is a skill published in the GitHub repository vinayaklatthe/microsoft-security-skills (173 stars, last pushed 2mo ago), licensed MIT. It adds 209 tokens to every session and 1,911 once invoked, about $0.0010 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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