place_wall · Minecraft Survival MCP Server MCP

WHAT IT DOES

What place_wall does on Minecraft Survival MCP Server

AI agents invoke place_wall to trigger actions in Minecraft Survival MCP Server. 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 place_wall needs a policy

This tool executes construction actions in the Minecraft world based on supplied arguments, making it an Execute category tool rather than a simple Write operation. The severity is medium because while it modifies the game state, the effects are reversible (structures can be broken) and the blast radius is limited to world state rather than external systems or data loss.

From the tool's definition Tool description states 'Place a rectangular wall' which triggers external operations in the Minecraft environment.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

place_wall Rate-limited

place_wall 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": {
    "place_wall": {
      "limits": [
        {
          "counter": "place_wall_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 Minecraft Survival MCP Server, so you can run agents against it safely.

FAQ

Questions about place_wall

What does the place_wall tool do? +

Place a rectangular wall from a start coordinate. Wall is a plane: either x_length or z_length must be 1. It is categorised as a Execute tool in the Minecraft Survival MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on place_wall? +

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

What risk level is place_wall? +

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

Can I rate-limit place_wall? +

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

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

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