setup_world · Minecraft Server MCP: Risk & Policy

WHAT IT DOES

What setup_world does on Minecraft Server MCP

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

WHY IT NEEDS A POLICY

Why setup_world needs a policy

This tool modifies server configuration files (server.properties), which is a Write operation. However, the description notes that the old world must be deleted or renamed for the new world to generate, meaning this tool itself does not delete anything — it only writes configuration.

From the tool's definition Configure server.properties for generating a new world. Sets the level name, seed, world type, and other generation options.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

setup_world Rate-limited

setup_world 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": {
    "setup_world": {
      "limits": [
        {
          "counter": "setup_world_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 Minecraft Server MCP, so you can run agents against it safely.

FAQ

Questions about setup_world

What does the setup_world tool do? +

Configure server.properties for generating a new world. Sets the level name, seed, world type, and other generation options. The server must be restarted (with the old world deleted or renamed) to generate the new world. It is categorised as a Write tool in the Minecraft Server MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on setup_world? +

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

What risk level is setup_world? +

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

Can I rate-limit setup_world? +

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

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

setup_world is provided by the Minecraft Server MCP server (tamo2918/minecraft-server-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

setup_world is one line of Minecraft Server's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

Teams ship this data inside their own products. See what a licence covers →