AI agents call get_active_workflows 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 queries and returns information about active workflows without creating, modifying, deleting, or executing any workflows. It is a read-only operation with minimal blast radius - the worst outcome is exposure of workflow metadata or information disclosure.
From the tool's definition Tool name 'get_active_workflows' and description 'Get all currently active workflows' indicate a retrieval/query operation with no modification, creation, or execution of workflows.
Documented attack patterns abuse exactly the kind of access get_active_workflows 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_active_workflows:
{
"version": "1",
"default": "deny",
"tools": {
"get_active_workflows": {}
}
} get_active_workflows is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get all currently active workflows. 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_active_workflows: 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_active_workflows 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_active_workflows 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_active_workflows. 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_active_workflows 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.
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44 NIST MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.