archimate_open_model

THE RISK

Low Risk

Why archimate_open_model needs a policy

The tool opens and reads an existing model, returning metadata. There are no side effects described — it does not modify, create, or delete anything. This is a pure read/query operation.

From the tool's definition Open an ArchiMate model from a coArchi repository directory. Returns model metadata including element counts by layer.

Documented attack patterns abuse exactly the kind of access archimate_open_model gives an agent:

POLICY

How to control archimate_open_model

PolicyLayer is an MCP gateway — it sits between your AI agents and ArchiMate MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for archimate_open_model:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "archimate_open_model": {}
  }
}

archimate_open_model is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register ArchiMate MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More ArchiMate MCP Server tools

Destructive archimate_delete_element Delete an element and its associated relationships Destructive archimate_delete_relationship Delete a relationship Write archimate_add_connection_to_view Manually add a connection (line/arrow) between two diagram objects in a view. Normally unn Write archimate_add_to_view Add an element to a diagram view. Connections for relationships between this element and a Write archimate_configure_audit Configure audit logging for model operations Write archimate_create_application_element Create an Application layer element (Chapter 9). Use for application components, services, Write archimate_create_business_element Create a Business layer element (Chapter 8). Use for actors, processes, services, and busi Write archimate_create_composite_element Create a composite element (Chapter 4). Use for grouping and locations.

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about archimate_open_model

What does the archimate_open_model tool do? +

Open an ArchiMate model from a coArchi repository directory. Returns model metadata including element counts by layer. It is categorised as a Read tool in the ArchiMate MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on archimate_open_model? +

Register the ArchiMate MCP Server MCP server in PolicyLayer and add a rule for archimate_open_model: 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 ArchiMate MCP Server. Nothing to install.

What risk level is archimate_open_model? +

archimate_open_model is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit archimate_open_model? +

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

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

archimate_open_model is provided by the ArchiMate MCP Server MCP server (thijs-hakkenberg/archimate-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every ArchiMate MCP Server tool call.

Start from ArchiMate MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →