AI agents call vul_vendors to retrieve information from Cve Search without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists vendor information from the CVE-Search database. It performs a read-only operation with no side effects, no code execution, and no data modification. The narrow scope (vendors only) and informational nature classify it as a low-severity Read operation.
From the tool's definition Tool name 'vul_vendors' and description 'To get a JSON with all the vendors' indicate a query/retrieval operation that returns vendor data without modification or execution.
Documented attack patterns abuse exactly the kind of access vul_vendors gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Cve Search, and nothing reaches the server without passing your rules. This is the rule we recommend for vul_vendors:
{
"version": "1",
"default": "deny",
"tools": {
"vul_vendors": {}
}
}vul_vendors is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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To get a JSON with all the vendors. It is categorised as a Read tool in the Cve Search MCP Server, which means it retrieves data without modifying state.
Register the Cve Search MCP server in PolicyLayer and add a rule for vul_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 Cve Search. Nothing to install.
vul_vendors is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the vul_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.
Set action: deny in the PolicyLayer policy for vul_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.
vul_vendors is provided by the Cve Search MCP server (roadwy/cve-search_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 6 Cve Search tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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6 Cve Search tools catalogued and risk-classified — across an index of 42,500+ MCP servers.