list_cve_vendors

THE RISK

Low Risk

Why list_cve_vendors needs a policy

This tool queries and returns publicly available CVE vendor data from cve-search.org. It performs no data modification, deletion, code execution, or financial operations. The blast radius of misuse is minimal—an agent could only retrieve vendor information already public in CVE databases, with no capability to alter security posture or systems.

From the tool's definition Tool name 'list_cve_vendors' and description 'Get a list of all vendors in the CVE database' indicate a read-only query operation that retrieves vendor information without modification or side effects.

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

POLICY

How to control list_cve_vendors

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

policy.json

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

list_cve_vendors 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 RAD Security — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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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 list_cve_vendors

What does the list_cve_vendors tool do? +

Get a list of all vendors in the CVE database. Source: cve-search.org. It is categorised as a Read tool in the RAD Security MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_cve_vendors? +

Register the RAD Security MCP server in PolicyLayer and add a rule for list_cve_vendors: 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 RAD Security. Nothing to install.

What risk level is list_cve_vendors? +

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

Can I rate-limit list_cve_vendors? +

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

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

list_cve_vendors is provided by the RAD Security MCP server (rad-security/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every RAD Security tool call.

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

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