nodejs_version

THE RISK

Low Risk

Why nodejs_version needs a policy

This tool queries and returns version metadata about development tools. It performs information retrieval only, with caching as an optimization feature. There are no destructive, financial, write, or execute operations—it simply reports current versions of installed Node.js package managers and the Node.js runtime itself. The blast radius of misuse is negligible.

From the tool's definition Tool retrieves version information for Node.js tools (node, npm, yarn, pnpm, bun) with caching. The description explicitly states it 'gets' version information, which is a read-only query operation with no data modification or side effects.

Documented attack patterns abuse exactly the kind of access nodejs_version gives an agent:

POLICY

How to control nodejs_version

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP DevTools Server, and nothing reaches the server without passing your rules. This is the rule we recommend for nodejs_version:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "nodejs_version": {}
  }
}

nodejs_version is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register MCP DevTools Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about nodejs_version

What does the nodejs_version tool do? +

Get version information for Node.js tools (node, npm, yarn, pnpm, bun) with caching. It is categorised as a Read tool in the MCP DevTools Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on nodejs_version? +

Register the MCP DevTools Server MCP server in PolicyLayer and add a rule for nodejs_version: 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 MCP DevTools Server. Nothing to install.

What risk level is nodejs_version? +

nodejs_version is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit nodejs_version? +

Yes. Add a rate_limit block to the nodejs_version 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 nodejs_version completely? +

Set action: deny in the PolicyLayer policy for nodejs_version. 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 nodejs_version? +

nodejs_version is provided by the MCP DevTools Server MCP server (rshade/mcp-devtools-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP DevTools Server tool call.

Start from MCP DevTools Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →