Microsoft Foundry DevTools is a collection of developer tools, documentation, community resources, and source code for building, deploying, evaluating, and managing AI applications and agents with Microsoft Foundry. Developers use its terminal tools, coding-agent guidance, VS Code toolkit, and Foundry Canvas to choose a development workflow. The catalogue includes a Foundry skill that gives coding agents reusable guidance for working with Foundry.
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 microsoft/foundry-dev-tools --skill validate-microsoft-foundry-hosted-agentgit clone --depth 1 https://github.com/microsoft/foundry-dev-toolsWrote 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/microsoft/foundry-dev-tools/validate-microsoft-foundry-hosted-agent)<a href="https://agentmods.dev/skills/microsoft/foundry-dev-tools/validate-microsoft-foundry-hosted-agent"><img src="https://agentmods.dev/badge/skills/microsoft/foundry-dev-tools/validate-microsoft-foundry-hosted-agent/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/microsoft/foundry-dev-tools/validate-microsoft-foundry-hosted-agent"><img src="https://agentmods.dev/badge/skills/microsoft/foundry-dev-tools/validate-microsoft-foundry-hosted-agent.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 | $0.00047 | $0.00191 |
| Opus 5 | $0.00023 | $0.00096 |
| Sonnet 5 | $0.00009 | $0.00038 |
| Haiku 4.5 | $0.00005 | $0.00019 |
Grade A, and why
validate-microsoft-foundry-hosted-agent 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 2d 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.
What it actually says
Validate a Microsoft Foundry hosted agent
Load the microsoft-foundry skill and follow
foundry-agent/validate/validate.md exactly. Treat the slash-command input as
free-form validation input.
After the canonical validation workflow writes its JSON report, open the
hosted-agent-validation-report canvas with:
{
"report": "<absolute or workspace-relative JSON report path>"
}
Use a stable canvas instance ID derived from the report ID. Do not transform the report before opening the canvas.
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.
- 2d ago First seen · 25 lines · 47 tokens per session scan A a957845d27bf
validate-microsoft-foundry-hosted-agent is a skill published in the GitHub repository microsoft/foundry-dev-tools (2,052 stars, last pushed yesterday), licensed MIT. It adds 47 tokens to every session and 191 once invoked, about $0.0002 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 2026-09-08.
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