List all users in the n8n instance. Requires owner role. Args: - limit (number): Max results (1-250, default 20) - cursor (string?): Pagination cursor
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.
This tool retrieves user information from the n8n instance without creating, modifying, or deleting any data. It is a read operation. However, severity is elevated to medium because: (1) listing all users exposes sensitive information about who has access to the automation platform, which could aid in social engineering or privilege escalation attacks, (2) the owner-role requirement suggests this is privileged…
From the tool's definition Tool description explicitly states 'List all users in the n8n instance' — a retrieval operation with no modification, deletion, or execution of side effects. The name 'list_users' confirms read-only functionality.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
List all users in the n8n instance. Requires owner role. Args: - limit (number): Max results (1-250, default 20) - cursor (string?): Pagination cursor. It is categorised as a Read tool in the n8n MCP Server MCP Server, which means it retrieves data without modifying state.
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.
n8n_list_users 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 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.
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.
n8n_list_users is provided by the n8n MCP Server MCP server (verzth/mcp-n8n). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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