send-chat · Minecraft MCP Server MCP: Risk & Policy

WHAT IT DOES

What send-chat does on Minecraft MCP Server

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

WHY IT NEEDS A POLICY

Why send-chat needs a policy

Sending a chat message creates new data (the message) in the game's chat system. This is reversible (messages can be ignored or deleted by players) and has no side effects on game state, inventory, or world structure. It does not execute arbitrary code, delete anything, or move funds.

From the tool's definition Tool name 'send-chat' and description 'Send a chat message in-game' indicate creation of new chat message data in the game world.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

send-chat Rate-limited

send-chat 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": {
    "send-chat": {
      "limits": [
        {
          "counter": "send-chat_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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

FAQ

Questions about send-chat

What does the send-chat tool do? +

Send a chat message in-game. It is categorised as a Write tool in the Minecraft 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 send-chat? +

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

What risk level is send-chat? +

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

Can I rate-limit send-chat? +

Yes. Add a rate_limit block to the send-chat 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 send-chat completely? +

Set action: deny in the PolicyLayer policy for send-chat. 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 send-chat? +

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