Get all SP 800-171 controls in a specific family
AI agents call get_sp800171_family to retrieve information from NIST MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves NIST SP 800-171 security control information from a specific family. It is a read-only query operation that returns data without side effects, no code execution, no data modification, and no destructive operations. The low severity reflects that information retrieval alone poses minimal risk even if misused by an agent, as it cannot directly harm systems or data.
From the tool's definition Tool name and description indicate retrieval only: 'Get all SP 800-171 controls in a specific family' performs a query/read operation without modifying or executing anything.
Documented attack patterns abuse exactly the kind of access get_sp800171_family gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and NIST MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_sp800171_family:
{
"version": "1",
"default": "deny",
"tools": {
"get_sp800171_family": {}
}
}get_sp800171_family is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Get all SP 800-171 controls in a specific family. It is categorised as a Read tool in the NIST MCP Server MCP Server, which means it retrieves data without modifying state.
Register the NIST MCP Server MCP server in PolicyLayer and add a rule for get_sp800171_family: 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 NIST MCP Server. Nothing to install.
get_sp800171_family 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 get_sp800171_family 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 get_sp800171_family. 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.
get_sp800171_family is provided by the NIST MCP Server MCP server (tnicholson/nist-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from NIST MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
44 NIST MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.