md · Node Js MCP Server MCP: Risk & Policy

WHAT IT DOES

What md does on Node Js MCP Server

AI agents use md to create or update resources in Node Js MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Node Js MCP Server environment.

WHY IT NEEDS A POLICY

Why md needs a policy

The tool can both read and create README.md files. While reading is non-destructive, the ability to create (and potentially overwrite) a README.md file classifies this as Write. The severity is low because README files are not critical system components, and changes are easily reversible.

From the tool's definition Tool description states 'Read or create project README.md' — the 'create' action indicates it can write/create files, making this a Write operation rather than Read alone.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

md Rate-limited

md stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "md": {
      "limits": [
        {
          "counter": "md_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Node Js MCP Server, so you can run agents against it safely.

FAQ

Questions about md

What does the md tool do? +

Context Management & Learning - Read or create project README.md. It is categorised as a Write tool in the Node Js MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on md? +

Register the Node Js MCP Server MCP server in PolicyLayer and add a rule for md: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Node Js MCP Server. Nothing to install.

What risk level is md? +

md is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit md? +

Yes. Add a rate_limit block to the md rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block md completely? +

Set action: deny in the PolicyLayer policy for md. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides md? +

md is provided by the Node Js MCP Server MCP server (mustafa-can/mcpserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.