AI agents call cross_reference to retrieve information from Security Framework without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
With no explicit description provided, 'cross_reference' most likely performs data retrieval by matching or correlating security framework elements. The sibling tools (assess_mcp_security, compliance_map, get_cve_detail, etc.) are primarily Read operations, suggesting this server emphasizes querying frameworks rather than modifying or executing code.
From the tool's definition Tool name 'cross_reference' in a security framework context suggests querying or looking up relationships between security concepts (e.g., linking CVEs to NIST controls, OWASP categories, or attack patterns).
Documented attack patterns abuse exactly the kind of access cross_reference gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Security Framework, and nothing reaches the server without passing your rules. This is the rule we recommend for cross_reference:
{
"version": "1",
"default": "deny",
"tools": {
"cross_reference": {}
}
}cross_reference is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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cross_reference. It is categorised as a Read tool in the Security Framework MCP Server, which means it retrieves data without modifying state.
Register the Security Framework MCP server in PolicyLayer and add a rule for cross_reference: 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 Security Framework. Nothing to install.
cross_reference 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 cross_reference 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 cross_reference. 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.
cross_reference is provided by the Security Framework MCP server (zer0-kr/security-framework-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Security Framework, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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41 Security Framework tools catalogued and risk-classified — across an index of 43,000+ MCP servers.