set_gamerule · OPanel MCP: Risk & Policy

WHAT IT DOES

What set_gamerule does on OPanel MCP

AI agents invoke set_gamerule to trigger actions in OPanel MCP. 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 set_gamerule needs a policy

Setting a gamerule modifies live server behavior (e.g., disabling fire spread, toggling PvP, keepInventory), which is a runtime configuration change with immediate effect on the running Minecraft server. It's not a simple data write but an operational change that affects server execution state.

From the tool's definition Set a gamerule of the Minecraft server

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_gamerule Rate-limited

set_gamerule 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": {
    "set_gamerule": {
      "limits": [
        {
          "counter": "set_gamerule_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 OPanel MCP, so you can run agents against it safely.

FAQ

Questions about set_gamerule

What does the set_gamerule tool do? +

Set a gamerule of the Minecraft server. It is categorised as a Execute tool in the OPanel MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on set_gamerule? +

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

What risk level is set_gamerule? +

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

Can I rate-limit set_gamerule? +

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

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

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