create_new_range

Create a new range.

SERVERLudus FastMCP SOURCEtjnull/ludus-fastmcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/tjnull-ludus-fastmcp/create-new-range.md

WHAT IT DOES

What create_new_range does on Ludus FastMCP

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

RISK

Why create_new_range is rated Medium

This tool creates a new cyber range environment, which is a reversible write operation. While it allocates resources and creates infrastructure, it does not execute arbitrary code, delete data, move money, or trigger destructive changes. The blast radius is moderate—misuse could consume resources or create unwanted environments, but the effect is containable and reversible through deletion or teardown.

From the tool's definition Tool name is 'create_new_range' and description states 'Create a new range.' The verb 'create' indicates data creation/instantiation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_new_range safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Ludus FastMCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For create_new_range, this is the rule to start with:

create_new_range Rate-limited

create_new_range 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_new_range": {
      "limits": [
        {
          "counter": "create_new_range_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Ludus FastMCP, apply this rule, and every create_new_range call is checked against it from then on.

FAQ

Questions about create_new_range

What does the create_new_range tool do? +

Create a new range. It is categorised as a Write tool in the Ludus FastMCP 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_new_range? +

Register the Ludus Fast MCP server in PolicyLayer and add a rule for create_new_range: 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 Ludus FastMCP. Nothing to install.

What risk level is create_new_range? +

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

Can I rate-limit create_new_range? +

Yes. Add a rate_limit block to the create_new_range 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_new_range completely? +

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

create_new_range is provided by the Ludus Fast MCP server (tjnull/ludus-fastmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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