create_lab · Claude-Modeling-Labs MCP Server MCP

WHAT IT DOES

What create_lab does on Claude-Modeling-Labs MCP Server

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

WHY IT NEEDS A POLICY

Why create_lab needs a policy

The tool creates new lab environments in CML, which is a Write operation—it modifies the system state by adding new resources. While creating labs can consume resources and affect lab management, the operation is reversible (labs can be removed), so it does not qualify as Destructive.

From the tool's definition Tool name 'create_lab' and description 'Create a new lab in CML' indicate creation of a new resource in the Cisco Modeling Labs system. This is a reversible operation (labs can be deleted), and creates new data structures in the lab environment.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_lab Rate-limited

create_lab 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_lab": {
      "limits": [
        {
          "counter": "create_lab_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 Claude-Modeling-Labs MCP Server, so you can run agents against it safely.

FAQ

Questions about create_lab

What does the create_lab tool do? +

Create a new lab in CML. It is categorised as a Write tool in the Claude-Modeling-Labs 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 create_lab? +

Register the Claude-Modeling-Labs MCP Server MCP server in PolicyLayer and add a rule for create_lab: 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 Claude-Modeling-Labs MCP Server. Nothing to install.

What risk level is create_lab? +

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

Can I rate-limit create_lab? +

Yes. Add a rate_limit block to the create_lab 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_lab completely? +

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

create_lab is provided by the Claude-Modeling-Labs MCP Server MCP server (mediocretriumph/claude-cml-toolkit). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.