It gives the agent controlled access to project files without granting access to the whole filesystem.

filesystem — MCP server by Agent-Threat-Rule/agent-threat-rules

filesystem

filesystem is an MCP server for Claude Code, Codex, Cursor, Gemini CLI, OpenCode from Agent-Threat-Rule/agent-threat-rules. Its token cost is not measured, scanned A, original, MIT.

A local file-access tool that lets an agent read and write files in specified directories on your computer.

In plain words

What is it for?: Use it to inspect, create, or update files in allowed folders such as a documentation directory.
Why use it?: It gives the agent controlled access to project files without granting access to the whole filesystem.

Written for no agent in particular: it speaks MCP, so any client can run it. Also seen: listed in a Claude config.

Good fit Use it to inspect, create, or update files in allowed folders such as a documentation directory.

Compare 6 mcp servers from other repositories ↓

Install with agentmods

npx agentmods add mcp/agent-threat-rule/agent-threat-rules/action-smoke-filesystem

Install

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.

Clone the repo

git clone --depth 1 https://github.com/Agent-Threat-Rule/agent-threat-rules

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/mcp/agent-threat-rule/agent-threat-rules/action-smoke-filesystem/github.svg)](https://agentmods.dev/mcp/agent-threat-rule/agent-threat-rules/action-smoke-filesystem)

Your own site

<a href="https://agentmods.dev/mcp/agent-threat-rule/agent-threat-rules/action-smoke-filesystem"><img src="https://agentmods.dev/badge/mcp/agent-threat-rule/agent-threat-rules/action-smoke-filesystem/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.

Your own site · 80×15

<a href="https://agentmods.dev/mcp/agent-threat-rule/agent-threat-rules/action-smoke-filesystem"><img src="https://agentmods.dev/badge/mcp/agent-threat-rule/agent-threat-rules/action-smoke-filesystem.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

filesystem 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 3d 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.

.github/action-smoke/.mcp.json · 10 lines

What it actually says

{
  "filesystem": {
    "command": "npx",
    "args": [
      "-y",
      "@modelcontextprotocol/server-filesystem",
      "./docs"
    ]
  }
}

Changes

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.

3d ago First seen · 10 lines scan A f9197edcca9b

Subscribe to this mod's changes

filesystem is an MCP server published in the GitHub repository Agent-Threat-Rule/agent-threat-rules (425 stars, last pushed yesterday), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. 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 2026-11-03.

Prompt Injection agent-security ai-security llm-security mcp-security owasp

filesystem next to 6 mcp servers from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
filesystemAgent-Threat-Rule/agent-threat-rules	MCP server	425	yesterday	MIT	A	—	Claude Code, Codex, Cursor, Gemini CLI, OpenCode
dfx-agentguarddockfixlabs/agentguard	MCP server	3	3mo ago	LGPL-3.0	A	—	Claude Code, Codex, Cursor, Gemini CLI, OpenCode
filesystemopena2a-org/hackmyagent	MCP server	90	7d ago	Apache-2.0	A	—	Cursor
shellopena2a-org/hackmyagent	MCP server	90	7d ago	Apache-2.0	A	—	Cursor
shellwardjnMetaCode/shellward	MCP server	138	1mo ago	Apache-2.0	A	—	Claude Code, Codex, Cursor, Gemini CLI, OpenCode
sunglassessunglasses-dev/sunglasses	MCP server	11	2d ago	MIT	A	—	Claude Code
scannerbawbel/scanner	MCP server	12	12d ago	Apache-2.0	A	—	Claude Code, Codex, Cursor, Gemini CLI, OpenCode