n8n_list_users · n8n MCP Server MCP: Risk & Policy

WHAT IT DOES

What n8n_list_users does on n8n MCP Server

AI agents call n8n_list_users to retrieve information from n8n MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why n8n_list_users needs a policy

This tool retrieves user data from the n8n instance without modifying, executing, or deleting anything. However, user lists can be sensitive information in multi-tenant or multi-user environments, revealing organizational structure and access patterns, hence 'medium' severity rather than 'low'.

From the tool's definition Tool name is 'n8n_list_users' and description states 'List all users' — a pure query operation with no side effects.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

Questions about n8n_list_users

What does the n8n_list_users tool do? +

List all users. It is categorised as a Read tool in the n8n MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on n8n_list_users? +

Register the n8n MCP Server MCP server in PolicyLayer and add a rule for n8n_list_users: 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 n8n MCP Server. Nothing to install.

What risk level is n8n_list_users? +

n8n_list_users is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit n8n_list_users? +

Yes. Add a rate_limit block to the n8n_list_users 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 n8n_list_users completely? +

Set action: deny in the PolicyLayer policy for n8n_list_users. 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 n8n_list_users? +

n8n_list_users is provided by the n8n MCP Server MCP server (shravan1610/n8n-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.