create_map · RPG Maker MZ MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_map does on RPG Maker MZ MCP Server

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

WHY IT NEEDS A POLICY

Why create_map needs a policy

This tool creates new map data, which is a reversible Write operation. It adds content to the project but does not execute arbitrary code, delete data, or cause irreversible changes. The severity is medium because creating maps could consume resources or create numerous unwanted maps if misused by an agent, but the impact is confined to project structure and is reversible through deletion.

From the tool's definition Tool name 'create_map' and description 'Create a new map in the project' indicate the tool creates new data structures within an RPG Maker MZ project.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_map Rate-limited

create_map 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_map": {
      "limits": [
        {
          "counter": "create_map_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 RPG Maker MZ MCP Server, so you can run agents against it safely.

FAQ

Questions about create_map

What does the create_map tool do? +

Create a new map in the project. It is categorised as a Write tool in the RPG Maker MZ 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_map? +

Register the RPG Maker MZ MCP Server MCP server in PolicyLayer and add a rule for create_map: 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 RPG Maker MZ MCP Server. Nothing to install.

What risk level is create_map? +

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

Can I rate-limit create_map? +

Yes. Add a rate_limit block to the create_map 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_map completely? +

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

create_map is provided by the RPG Maker MZ MCP Server MCP server (rein1225/rpgmakermz_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.