npm_audit_fix · NPM MCP Server MCP: Risk & Policy

WHAT IT DOES

What npm_audit_fix does on NPM MCP Server

AI agents invoke npm_audit_fix to trigger actions in NPM MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why npm_audit_fix needs a policy

npm audit fix automatically updates/replaces package versions to fix vulnerabilities. It modifies the node_modules directory and package-lock.json, potentially making breaking changes to dependencies. While it writes/updates files, it also executes npm's resolution and installation process with potentially wide-ranging side effects.

From the tool's definition 'Arreglar vulnerabilidades automáticamente' (Fix vulnerabilities automatically) — this tool automatically modifies installed packages to remediate security issues

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

npm_audit_fix Rate-limited

npm_audit_fix stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "npm_audit_fix": {
      "limits": [
        {
          "counter": "npm_audit_fix_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about npm_audit_fix

What does the npm_audit_fix tool do? +

Arreglar vulnerabilidades automáticamente. It is categorised as a Execute tool in the NPM MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on npm_audit_fix? +

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

What risk level is npm_audit_fix? +

npm_audit_fix is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit npm_audit_fix? +

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

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

npm_audit_fix is provided by the NPM MCP Server MCP server (kpangaa/npm-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.