List available node types from the connected n8n instance.
AI agents call list_node_types to retrieve information from N8n Workflow Tester Safe 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 metadata about available node types in an n8n instance. It does not create, modify, delete, execute, or trigger any workflows or external operations. The blast radius of misuse is minimal: an attacker could only discover what node types exist, which is informational. The 'safety-first approach' noted in the server description reinforces that this is a read-only introspection tool.
From the tool's definition Tool name and description indicate it 'List[s] available node types' — a retrieval operation with no side effects. Matches the Read category definition: 'retrieves or queries data; no side effects (search, list, get, fetch).'
Attacks that exploit this kind of access
List available node types from the connected n8n instance. It is categorised as a Read tool in the N8n Workflow Tester Safe MCP Server, which means it retrieves data without modifying state.
Register the N8n Workflow Tester Safe MCP server in PolicyLayer and add a rule for list_node_types: 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 Workflow Tester Safe. Nothing to install.
list_node_types 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 list_node_types 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 list_node_types. 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.
list_node_types is provided by the N8n Workflow Tester Safe MCP server (souzix76/n8n-workflow-tester-safe). 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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