create_node · Mcp Archimate MCP: Risk & Policy

WHAT IT DOES

What create_node does on Mcp Archimate

AI agents use create_node to create or update resources in Mcp Archimate — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Archimate environment.

WHY IT NEEDS A POLICY

Why create_node needs a policy

The tool creates new nodes (visual representations) in ArchiMate models, which is a reversible write operation. While it modifies the architecture model, the action can be undone by deletion. This is less severe than destructive operations but more impactful than read operations.

From the tool's definition Tool name 'create_node' and description prefix 'Ajoute un nœud' (French: 'Adds a node') indicate creation of visual representation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_node Rate-limited

create_node stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_node": {
      "limits": [
        {
          "counter": "create_node_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mcp Archimate, so you can run agents against it safely.

FAQ

Questions about create_node

What does the create_node tool do? +

Ajoute un nœud (représentation visuelle d. It is categorised as a Write tool in the Mcp Archimate MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_node? +

Register the Mcp Archimate MCP server in PolicyLayer and add a rule for create_node: 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 Mcp Archimate. Nothing to install.

What risk level is create_node? +

create_node is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_node? +

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

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

create_node is provided by the Mcp Archimate MCP server (lacrif/mcp-archimate). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.