teleport_player · Mc MCP: Risk & Policy

WHAT IT DOES

What teleport_player does on Mc

AI agents invoke teleport_player to trigger actions in Mc. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why teleport_player needs a policy

Teleporting a player is an Execute action—it triggers an operation in the Minecraft game world whose outcome directly depends on the provided arguments (coordinates). While reversible, it significantly disrupts player experience and could be abused to trap, disorient, or harass players.

From the tool's definition Tool name: 'teleport_player'; description: 'Teleport a player to specified coordinates.' This action executes a game command with side effects that alter player state based on supplied arguments (coordinates).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

teleport_player Rate-limited

teleport_player stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "teleport_player": {
      "limits": [
        {
          "counter": "teleport_player_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mc, so you can run agents against it safely.

FAQ

Questions about teleport_player

What does the teleport_player tool do? +

Teleport a player to specified coordinates. It is categorised as a Execute tool in the Mc MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on teleport_player? +

Register the Mc MCP server in PolicyLayer and add a rule for teleport_player: 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 Mc. Nothing to install.

What risk level is teleport_player? +

teleport_player is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit teleport_player? +

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

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

teleport_player is provided by the Mc MCP server (rice-awa/mc-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.