create_custom_template

A write tool on the Ludus Fast MCP server.

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-custom-template.md

WHAT IT DOES

What create_custom_template does on Ludus FastMCP

AI agents use create_custom_template 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_custom_template is rated Medium

This tool creates new data artifacts (templates) within the system that can be reused for scenario deployment. Creation is reversible (templates can be deleted or modified), placing it in Write rather than Destructive. Severity is high because maliciously created templates could be deployed across multiple ranges, affecting many security testing scenarios.

From the tool's definition Tool name 'create_custom_template' combined with server context describing 'template creation' as a core capability. The tool enables creation of new templates within the Ludus cyber range platform.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_custom_template 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_custom_template, this is the rule to start with:

create_custom_template Rate-limited

create_custom_template 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_custom_template": {
      "limits": [
        {
          "counter": "create_custom_template_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_custom_template call is checked against it from then on.

FAQ

Questions about create_custom_template

What does the create_custom_template tool do? +

create_custom_template is a write tool on the Ludus Fast MCP server. 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_custom_template? +

Register the Ludus Fast MCP server in PolicyLayer and add a rule for create_custom_template: 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_custom_template? +

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

Can I rate-limit create_custom_template? +

Yes. Add a rate_limit block to the create_custom_template 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_custom_template completely? +

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

create_custom_template 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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