search_mod_code

Search for classes, methods, fields, or content in decompiled mod source code. Supports regex patterns. Use after decompile_mod_jar to search through a decompiled mod.

ServerMinecraft Dev MCP
CategoryRead

How to control search_mod_code ↓

WHAT IT DOES

What search_mod_code does on Minecraft Dev MCP

AI agents call search_mod_code to retrieve information from Minecraft Dev MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why search_mod_code needs a policy

This tool performs search and query operations on static source code that has already been decompiled. It retrieves information but does not execute code, modify files, delete data, or trigger external operations. The worst-case misuse would be information disclosure about mod code structure, which is low severity. No financial impact, no destructive actions, and no code execution capability.

From the tool's definition Tool description explicitly states it 'Search for classes, methods, fields, or content in decompiled mod source code' and 'Supports regex patterns.' The verb 'search' and the read-only nature of querying already-decompiled code indicate data retrieval with no…

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

POLICY

How to control search_mod_code

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 search_mod_code:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "search_mod_code": {}
  }
}

search_mod_code is read-only, so it stays allowed — but 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.

CAP THIS TOOL →

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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_minecraft_version Create a full-text search index for decompiled Minecraft source. Enables fast searching wi 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

All 20 Minecraft Dev MCP tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about search_mod_code

What does the search_mod_code tool do? +

Search for classes, methods, fields, or content in decompiled mod source code. Supports regex patterns. Use after decompile_mod_jar to search through a decompiled mod. It is categorised as a Read tool in the Minecraft Dev MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on search_mod_code? +

Register the Minecraft Dev MCP server in PolicyLayer and add a rule for search_mod_code: 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 search_mod_code? +

search_mod_code is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit search_mod_code? +

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

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

search_mod_code 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.

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20 Minecraft Dev MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.