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

WHAT IT DOES

What add_choice does on RPG Maker MZ MCP Server

AI agents use add_choice 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 add_choice needs a policy

This tool creates new interactive choice elements within RPG Maker MZ events. While it modifies game data, the changes are reversible (choices can be removed or edited), making it Write rather than Destructive. The severity is medium because misuse could create confusing or broken game logic (e.g., meaningless choices, narrative breaks), but these are recoverable and don't cause data loss or financial impact.

From the tool's definition The tool 'add_choice' adds a choice selection to an event, which modifies event data by inserting a new interactive element into the game's event system. This is a content creation operation that writes/creates new game data reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_choice Rate-limited

add_choice 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": {
    "add_choice": {
      "limits": [
        {
          "counter": "add_choice_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 add_choice

What does the add_choice tool do? +

Add a choice selection to an event. 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 add_choice? +

Register the RPG Maker MZ MCP Server MCP server in PolicyLayer and add a rule for add_choice: 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 add_choice? +

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

Can I rate-limit add_choice? +

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

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

add_choice 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.