AI agents call get_workflow_version to retrieve information from N8n without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only operation that queries and returns historical workflow version data. There are no side effects, data modifications, code execution, or irreversible actions. It merely fetches stored information from version history, making it a low-severity Read operation.
From the tool's definition Tool name 'get_workflow_version' and description 'Retrieve a specific version of a workflow from the version history' indicate data retrieval without modification or execution.
Attacks that exploit this kind of access
Retrieve a specific version of a workflow from the version history. It is categorised as a Read tool in the N8n MCP Server, which means it retrieves data without modifying state.
Register the N8n MCP server in PolicyLayer and add a rule for get_workflow_version: 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. Nothing to install.
get_workflow_version 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_workflow_version 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_workflow_version. 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_workflow_version is provided by the N8n MCP server (siddharth0903/n8n-mcp). 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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