auditing-ecs-task-metadata-boundaries SKILL.md skillA
auditing-ecs-task-metadata-boundaries from unboundcompute/security-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add unboundcompute/security-agent-skills/auditing-ecs-task-metadata-boundaries@git:20260827.b5f41a4Pins git:20260827.b5f41a4 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- unboundcompute/security-agent-skills
- Path
skills/auditing-ecs-task-metadata-boundaries/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260827.b5f41a4, committed Aug 27, 2026
- Size
- 9,287 bytes
- Repository stars
- 26
- License
- MIT
Audit container task credential and metadata boundaries in orchestrated compute such as ECS: a workload that can reach the container credential endpoint or the host instance metadata service to obtain a role broader than the task needs, a task role over-scoped for the workload, a sidecar or co-located container sharing the same credentials, and a server-side request path inside the task that reaches the metadata endpoint. Covers the task credential relative URI, the instance metadata service…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Auditing ECS task metadata boundaries: when a container reaches a credential it should not Containerized compute hands each task a role by serving credentials from a metadata endpoint the container can call. That design puts a powerful boundary inside the task: whatever the workload can reach at the credential endpoint, it can use. Two endpoints matter. The task credential endpoint returns the task role, which is fine if that role is scoped to exactly what the workload does. The host instance metadata service, if reachable from the task, returns the node's instance role, which is usually far broader and was never meant for the workload. A server-side request flaw inside the task, or a compromised sidecar, turns either endpoint into a credential-theft primitive. You audit these by checking which endpoints the workload can reach and how tightly the returned role is scoped. ## When to use - Containerized workloads assume a task or instance role served from a metadata endpoint. - A task can reach the host instance metadata service, not only its own task credential endpoint. …
Read the whole file at its exact version.
How to install
mdr add unboundcompute/security-agent-skills/auditing-ecs-task-metadata-boundaries@sha256:bc4d308c756e8ea2The line at the top of this page pins the label git:20260827.b5f41a4, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_gagt3xfykssaxkt7)
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Versions
The registry has recorded 1 version of this file, committed on Aug 27, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9287 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
unboundcompute/security-agent-skills · 26 stars · license MIT · pushed 2026-09-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_gagt3xfykssaxkt7 GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/auditing-ecs-task-metadata-boundaries GET https://markdownregistry.com/api/v1/blob/bc4d308c756e8ea286f08d88a966e1c70cc42d23fff57d889787936ea267d647
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.