create_group

Create a new group.

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-group.md

WHAT IT DOES

What create_group does on Ludus FastMCP

AI agents use create_group 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_group is rated Medium

Creating a new group is a reversible write operation that modifies system state by adding a new administrative or organizational entity. It does not execute arbitrary code, delete data, move money, or trigger external operations based on dynamic arguments. The impact is limited to creating metadata for group management within the cyber range platform.

From the tool's definition Tool name is 'create_group' and description states 'Create a new group.' This is a create operation that adds a new organizational entity to the system.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_group 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_group, this is the rule to start with:

create_group Rate-limited

create_group 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_group": {
      "limits": [
        {
          "counter": "create_group_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_group call is checked against it from then on.

FAQ

Questions about create_group

What does the create_group tool do? +

Create a new group. 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_group? +

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

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

Can I rate-limit create_group? +

Yes. Add a rate_limit block to the create_group 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_group completely? +

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

create_group 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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