// SCAN REPORT

MCP Filesystem Server

4 tools. 1 can modify or destroy data without limits.

1 write tool that can modify data. Rate limits recommended.

Last updated: 3 Jul 2026

1 can modify or destroy data

3 read-only

4 tools total

Community server · catalogue entry verified 03/07/2026

How to control MCP Filesystem Server ↓

TOOL MAP

What MCP Filesystem Server exposes to your agents

Read (3) Write / Execute (1) Destructive / Financial (0)

Running more than one server? Check your whole stack →

MOST DANGEROUS TOOLS

High Risk

The most dangerous MCP Filesystem Server tools

Write · High write_file This tool creates or modifies file content, which is reversible (can be overwritten or deleted later).

1 of MCP Filesystem Server's 4 tools can modify, destroy, or commit something on every call — and an agent calls them with no built-in limits.

POLICY

How to control MCP Filesystem Server

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Filesystem Server, and nothing reaches the server without passing your rules. These are the rules we recommend:

Rate limit write operations

{
  "write_file": {
    "limits": [
      {
        "counter": "write_file_per_hour",
        "window": "hour",
        "max": 30,
        "scope": "grant"
      }
    ]
  }
}

Prevents bulk unintended modifications from agents caught in loops.

Cap read operations

{
  "list_files": {
    "limits": [
      {
        "counter": "list_files_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register MCP Filesystem Server — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON MCP FILESYSTEM →

Instant setup, no code required.

FULL CATALOGUE

All 4 MCP Filesystem Server tools

WRITE 1 tools

Write write_file Write content to file

READ 3 tools

Read list_files List files in a directory Read read_file Read file contents Read search_files Search files containing text

FAQ

Questions about MCP Filesystem Server

How do I prevent bulk modifications through MCP Filesystem Server? +

The MCP Filesystem Server server has 1 write tools including write_file. Set a rate limit in your policy -- for example, 10 calls per hour prevents an agent from making more than 10 modifications per hour. PolicyLayer enforces this at the gateway, before calls reach MCP Filesystem Server.

How many tools does the MCP Filesystem Server MCP server expose? +

4 tools across 2 categories: Read, Write. 3 are read-only. 1 can modify, create, or delete data.

How do I enforce a policy on MCP Filesystem Server? +

Register the MCP Filesystem Server MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every MCP Filesystem Server tool call.

Deterministic rules across all 4 MCP Filesystem Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

ENFORCE POLICY ON MCP FILESYSTEM →

Instant setup, no code required.

4 MCP Filesystem Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.