go_vulncheck

THE RISK

Low Risk

Why go_vulncheck needs a policy

This tool runs govulncheck to scan a project for known vulnerabilities. It only reads and analyzes code/dependencies without modifying anything. The blast radius if misused is minimal since it's purely informational.

From the tool's definition 'Scan for known vulnerabilities using govulncheck' — scanning/reading is a passive, non-destructive operation

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

POLICY

How to control go_vulncheck

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 go_vulncheck:

policy.json

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

go_vulncheck 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 go_vulncheck

What does the go_vulncheck tool do? +

Scan for known vulnerabilities using govulncheck. 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 go_vulncheck? +

Register the MCP DevTools Server MCP server in PolicyLayer and add a rule for go_vulncheck: 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 go_vulncheck? +

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

Can I rate-limit go_vulncheck? +

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

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

go_vulncheck 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 →