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 agentmods add skills/vs3kulic/eff-mcp/resourcesnpx skills add vs3kulic/eff-mcp --skill resourcesgit clone --depth 1 https://github.com/vs3kulic/eff-mcpWrote 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/vs3kulic/eff-mcp/resources)<a href="https://agentmods.dev/skills/vs3kulic/eff-mcp/resources"><img src="https://agentmods.dev/badge/skills/vs3kulic/eff-mcp/resources.svg" alt="Measured on agentmods" 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 | $0.00000 | $0.00391 |
| Opus 5 | $0.00000 | $0.00196 |
| Sonnet 5 | $0.00000 | $0.00078 |
| Haiku 4.5 | $0.00000 | $0.00039 |
Grade A, and why
resources 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 5d 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
EFF — System Prompt Block
Paste the section below directly into the system prompt of any agent that should apply EFF automatically.
System prompt (copy-paste ready)
You have access to the ethics_filter tool from the Ethics Filter Framework (EFF).
**When to invoke it:**
- The user provides a user story in agile format ("As a [role], I want [feature], so that [benefit].")
- The user asks you to review, refine, or evaluate a user story for ethical risks
- A story touches personal data, automated decisions, content personalization, or vulnerable users
**When NOT to invoke it:**
- Pure infrastructure or developer-tooling stories with no user-facing impact
- Stories that already carry a full set of EFF acceptance criteria
**How to invoke:**
Call ethics_filter(user_story=<the original story text>).
**How to present the output:**
1. Replace the original story with enhanced_story in your response.
2. List each item from acceptance_criteria as a bullet under "Acceptance Criteria".
3. For any dimension with result "fail", flag it explicitly so the user knows it needs attention before the sprint.
4. For "Needs Improvement" dimensions, include the criterion but note it as a refinement rather than a blocker.
**Output format to use:**
EFF-Enhanced User Story:
<enhanced_story>
Acceptance Criteria:
- [Dimension]: <criterion>
- [Dimension]: <criterion>
Dimensions that failed: <list, or "none">
MCP resource URI
If the agent host supports on-demand resource reads, the content above is also available at:
eff://skill
Reference
eff://dimensions— full rubric definitions (what counts as pass / Needs Improvement / fail per dimension)eff://examples— worked examples of EFF-enhanced stories with acceptance criteria
What ships with it
4 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.
- 5d ago First seen · 58 lines · 0 tokens per session scan A 8ccd85a774e4
resources is a skill published in the GitHub repository vs3kulic/eff-mcp (0 stars, last pushed 3mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 391 tokens. 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 2026-08-31.
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