cluster_create · GreenNode MCP Server MCP: Risk & Policy

WHAT IT DOES

What cluster_create does on GreenNode MCP Server

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

WHY IT NEEDS A POLICY

Why cluster_create needs a policy

The name strongly implies creating a new Kubernetes cluster, which is a Write operation (creates new cloud infrastructure). While creating resources is generally reversible (the sibling tool 'cluster_delete' exists), provisioning cloud infrastructure can incur costs and has a high blast radius if misused.

From the tool's definition Tool name 'cluster_create' on a server that manages VNG Cloud infrastructure including Kubernetes resources. Description is empty.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cluster_create Rate-limited

cluster_create 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": {
    "cluster_create": {
      "limits": [
        {
          "counter": "cluster_create_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 GreenNode MCP Server, so you can run agents against it safely.

FAQ

Questions about cluster_create

What does the cluster_create tool do? +

cluster_create. It is categorised as a Write tool in the GreenNode MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on cluster_create? +

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

What risk level is cluster_create? +

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

Can I rate-limit cluster_create? +

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

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

cluster_create is provided by the GreenNode MCP Server MCP server (vngcloud/greennode-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.