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 oxbshw/LLM-Agents-Ecosystem-Handbook --skill mcp-security-reviewergit clone --depth 1 https://github.com/oxbshw/LLM-Agents-Ecosystem-HandbookWrote 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/oxbshw/llm-agents-ecosystem-handbook/mcp-security-reviewer)<a href="https://agentmods.dev/skills/oxbshw/llm-agents-ecosystem-handbook/mcp-security-reviewer"><img src="https://agentmods.dev/badge/skills/oxbshw/llm-agents-ecosystem-handbook/mcp-security-reviewer/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/oxbshw/llm-agents-ecosystem-handbook/mcp-security-reviewer"><img src="https://agentmods.dev/badge/skills/oxbshw/llm-agents-ecosystem-handbook/mcp-security-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector 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 | $0.00034 | $0.00391 |
| Opus 5.5 | $0.00014 | $0.00156 |
| Sonnet 5.5 | $0.00007 | $0.00078 |
| Haiku 4.5 | $0.00003 | $0.00039 |
Grade A, and why
mcp-security-reviewer 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 2mo 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
MCP Security Reviewer
When to use
- A new MCP server is being added to an agent
- An MCP server version is being bumped
- An incident triggered a re-review
Inputs
| Name | Type | Required | Notes |
|---|---|---|---|
repo_url |
string | yes | the MCP server's source |
version |
string | yes | tag or commit SHA being adopted |
intended_use |
string | yes | one paragraph: what we'll let it do |
Workflow
- Source review: clone at the pinned version; check for unexpected files / scripts
- Capabilities: list every tool and resource exposed; map to risk levels (
references/mcp-risk-matrix.md) - Network: identify outbound endpoints; document and assess each
- Permissions: minimum required scopes / tokens; document over-permissions
- Output handling: confirm the agent treats tool output as untrusted (sanitization, no execution)
- Approvals: define which tools require human approval
- Produce filled
MCP_SERVER.mdinmcp/<server>.md
References
Success criteria
- All tools labelled by risk
- High/Critical tools gated by approval
- Pinned version (no
latest/ floating refs) - Documented network egress
Failure modes
- Source unavailable / un-pinnable → reject
- Discovered hidden tool not in docs → reject and report upstream
What ships with it
1 file 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.
- 2mo ago First seen · 42 lines · 34 tokens per session scan A 698e80acf561
mcp-security-reviewer is a skill published in the GitHub repository oxbshw/LLM-Agents-Ecosystem-Handbook (558 stars, last pushed 4mo ago), licensed MIT. It adds 34 tokens to every session and 391 once invoked, about $0.0001 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 2026-08-30.
mcp-security-reviewer compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| mcp-security-revieweroxbshw/LLM-Agents-Ecosystem-Handbook | Skill | 558 | 4mo ago | MIT | A | 34 | Claude Code, Codex |
| fine-tuning-serving-openpiOrchestra-Research/AI-Research-SKILLs | Skill | 14k | 26d ago | MIT | A | 87 | Claude Code |
| fine-tuning-openvla-oftOrchestra-Research/AI-Research-SKILLs | Skill | 14k | 26d ago | MIT | A | 103 | Claude Code |
| together-ai-inferencesynthetic-sciences/openscience | Skill | 4.3k | 2d ago | Apache-2.0 | A | 55 | Claude Code, Codex |
| tinker-fine-tuningsynthetic-sciences/openscience | Skill | 4.3k | 2d ago | Apache-2.0 | A | 62 | Claude Code, Codex |
| tinker-training-costsynthetic-sciences/openscience | Skill | 4.3k | 2d ago | Apache-2.0 | A | 55 | Claude Code, Codex |
| transformerssynthetic-sciences/openscience | Skill | 4.3k | 2d ago | Apache-2.0 | A | 63 | Claude Code, Codex |