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-cloud-appsgit 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-cloud-apps)<a href="https://agentmods.dev/skills/vinayaklatthe/microsoft-security-skills/defender-for-cloud-apps"><img src="https://agentmods.dev/badge/skills/vinayaklatthe/microsoft-security-skills/defender-for-cloud-apps/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-cloud-apps"><img src="https://agentmods.dev/badge/skills/vinayaklatthe/microsoft-security-skills/defender-for-cloud-apps.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 | $0.00168 | $0.01755 |
| Opus 5 | $0.00084 | $0.00877 |
| Sonnet 5 | $0.00034 | $0.00351 |
| Haiku 4.5 | $0.00017 | $0.00176 |
Grade A, and why
defender-for-cloud-apps 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 — 121 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Microsoft Defender for Cloud Apps
Microsoft Defender for Cloud Apps (MDA) is a Cloud Access Security Broker (CASB) and SaaS security solution providing visibility into cloud app usage, governance of OAuth-connected apps, real-time session controls via Conditional Access App Control, and threat detection across connected SaaS services.
When to use
Discovering shadow IT, governing OAuth apps connected to Microsoft 365, applying in-session controls, and managing SaaS posture (SSPM). Use this skill when the question is about applications (SaaS or third-party), not IaaS or endpoints.
Do not use this skill for IaaS / PaaS posture (defender-for-cloud-hardening), EDR
(defender-for-endpoint), or DLP authoring (purview-dlp-policy).
Pick the MDA capability
| Goal | Capability | Notes |
|---|---|---|
| Find unsanctioned cloud apps in use | Cloud Discovery via MDE integration | Agentless; uses MDE telemetry |
| Get activity / file visibility for sanctioned SaaS | App connector (API-based) | M365, Salesforce, ServiceNow, Workday |
| Govern OAuth apps connected to Microsoft 365 | App governance add-on | Risk score + automated policies |
| Block file download in browser session | Conditional Access App Control (session) | Reverse proxy; integrates with CA |
| Detect anomalous user activity (impossible travel, mass download) | Anomaly detection policies | UEBA-style |
| Posture for connected SaaS (config drift) | SaaS Security Posture Management (SSPM) | Per-app recommendations |
| Investigate / contain a compromised SaaS account | Governance actions | Suspend, force re-auth, revoke OAuth |
Rule of thumb: start with Cloud Discovery via MDE (free with E5) to find shadow IT and app governance for OAuth risk - those two cover 80% of the SaaS attack surface. Session control via CAAC is powerful but the reverse proxy adds operational surface area; pilot it narrowly.
Approach
- Enable Cloud Discovery via MDE — Integration → Microsoft Defender for Endpoint → on. No agents, no log uploads - discovery happens automatically from MDE telemetry on managed endpoints. Verify: Discovery dashboard populates within 24-48 hours; app catalogue scores visible.
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 · 121 lines · 168 tokens per session scan A 2d380234f105
defender-for-cloud-apps is a skill published in the GitHub repository vinayaklatthe/microsoft-security-skills (173 stars, last pushed 2mo ago), licensed MIT. It adds 168 tokens to every session and 1,755 once invoked, about $0.0008 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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