index_minecraft_version

THE RISK

Medium Risk

Why index_minecraft_version needs a policy

Creating a search index is a Write operation: it generates and stores searchable data structures without deleting or overwriting existing Minecraft source code. The operation is reversible (the index can be dropped and rebuilt), has no external side effects beyond local storage, and poses minimal risk even if misused by an AI agent.

From the tool's definition The tool description states it 'Create[s] a full-text search index', which is an act of creating data (the index artifact) that is reversible—the index can be regenerated or deleted.

Documented attack patterns abuse exactly the kind of access index_minecraft_version gives an agent:

POLICY

How to control index_minecraft_version

PolicyLayer is an MCP gateway — it sits between your AI agents and Minecraft Dev MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for index_minecraft_version:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "index_minecraft_version": {
      "limits": [
        {
          "counter": "index_minecraft_version_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

index_minecraft_version 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.

Create a free account and register Minecraft Dev MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Minecraft Dev MCP tools

Execute decompile_minecraft_version Decompile an entire Minecraft version. By default downloads the client JAR from Mojang, re Execute decompile_mod_jar Decompile a mod JAR file to readable Java source code. The JAR can be either the original Execute remap_mod_jar Remap a Fabric mod JAR from intermediary mappings to human-readable mappings. Useful for r Write index_mod Create a full-text search index for decompiled mod source code. Enables fast searching wit Read analyze_mixin Analyze and validate Mixin code against Minecraft source. Parses @Mixin annotations, valid Read analyze_mod_jar Analyze a third-party mod JAR file to extract metadata, dependencies, entry points, mixins Read compare_versions Compare two Minecraft versions to find differences in classes or registry data. Useful for Read compare_versions_detailed Compare two Minecraft versions with detailed AST-level analysis. Shows method signature ch

All 20 Minecraft Dev MCP tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about index_minecraft_version

What does the index_minecraft_version tool do? +

Create a full-text search index for decompiled Minecraft source. Enables fast searching with search_indexed tool. It is categorised as a Write tool in the Minecraft Dev MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on index_minecraft_version? +

Register the Minecraft Dev MCP server in PolicyLayer and add a rule for index_minecraft_version: 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 Dev MCP. Nothing to install.

What risk level is index_minecraft_version? +

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

Can I rate-limit index_minecraft_version? +

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

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

index_minecraft_version is provided by the Minecraft Dev MCP server (mcdxai/minecraft-dev-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Minecraft Dev MCP tool call.

Start from Minecraft Dev MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →