AI agents call get-flow to retrieve information from Node Red without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'get-flow' tool retrieves flow configuration data from Node-RED without modifying it, making it a Read operation. Severity is medium because flow definitions can contain sensitive logic, credentials, or system architecture details that an AI agent could expose if misused, but the action itself is not destructive or financially significant.
From the tool's definition Tool name is 'get-flow' and belongs to a Node-RED interaction server alongside 'get-flows', 'get-flows-formatted', and 'get-flows-state'. The 'get-' prefix indicates data retrieval with no modification. Description is empty, limiting direct evidence.
Attacks that exploit this kind of access
get-flow. It is categorised as a Read tool in the Node Red MCP Server, which means it retrieves data without modifying state.
Register the Node Red MCP server in PolicyLayer and add a rule for get-flow: 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 Node Red. Nothing to install.
get-flow 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-flow 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-flow. 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-flow is provided by the Node Red MCP server (node-red-mcp-server). 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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