Agent Toolkit for AWS is a collection of AWS-supported MCP servers, skills, plugins, commands, and hooks that help AI coding agents build, deploy, and manage applications on AWS. It is used by developers working with AWS services through agents such as Claude Code, Codex, Cursor, and Kiro. The catalogue entries are the toolkit's own agent extensions for AWS development and operations.
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 aws/agent-toolkit-for-aws --skill aws-fault-injection-servicegit clone --depth 1 https://github.com/aws/agent-toolkit-for-awsWrote 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/aws/agent-toolkit-for-aws/aws-fault-injection-service)<a href="https://agentmods.dev/skills/aws/agent-toolkit-for-aws/aws-fault-injection-service"><img src="https://agentmods.dev/badge/skills/aws/agent-toolkit-for-aws/aws-fault-injection-service/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/aws/agent-toolkit-for-aws/aws-fault-injection-service"><img src="https://agentmods.dev/badge/skills/aws/agent-toolkit-for-aws/aws-fault-injection-service.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
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 | $0.00204 | $0.01912 |
| Opus 5.5 | $0.00082 | $0.00765 |
| Sonnet 5.5 | $0.00041 | $0.00382 |
| Haiku 4.5 | $0.00020 | $0.00191 |
Grade A, and why
aws-fault-injection-service 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 22d 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 — 151 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AWS Fault Injection Service (FIS) Experiments
Overview
Domain expertise for AWS Fault Injection Service (AWS FIS) — a managed chaos-engineering service that runs controlled fault injection experiments on real AWS resources so you can observe how an application responds to disruption and improve its resilience.
This skill lets an agent do three things:
- Suggest the right experiment — map a user's failure scenario or resilience question to the correct FIS action(s), scenario, or experiment design, and explain the trade-offs.
- Build and run experiments — author experiment templates (actions, targets, stop conditions, logging, reports), wire up the experiment IAM role, and drive the run/monitor/stop lifecycle via CLI, SDK, or CloudFormation.
- Inform the user — answer conceptual questions about FIS terminology, safety, pricing, supported services, and how FIS fits into a resilience program.
AWS FIS carries out real actions on real AWS resources. Before running any experiment in production, plan it, run it first in pre-production, and always bound the blast radius with a stop condition. Treat fault injection as a privileged, potentially disruptive operation.
The AWS MCP server is recommended for executing this skill's AWS API calls — it provides sandboxed execution and audit logging — but it is not required; all operations also work with the AWS CLI (
aws fis ...) directly.
Guardrail — where this skill's own files live (MCP vs local install)
Before reading a reference file, determine how this skill was loaded:
- Loaded via the AWS MCP
retrieve_skilltool: the skill's reference files are not on the local filesystem. Fetch each one throughretrieve_skillwith thefileparameter (e.g.file="references/fis-concepts.md") — do NOTfile_readthese paths locally or search the filesystem for them. - Installed locally (e.g.
.kiro/skills/aws-fault-injection-service/or~/.claude/skills/aws-fault-injection-service/): read reference files from the local skill directory using the relative paths shown here.
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 22d ago First seen · 151 lines · 204 tokens per session scan A 3db498229b80
aws-fault-injection-service is a skill published in the GitHub repository aws/agent-toolkit-for-aws (2,886 stars, last pushed yesterday), licensed Apache-2.0. It adds 204 tokens to every session and 1,912 once invoked, about $0.0008 per session on Opus 5.5. 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 2026-09-24.
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