list_modules

THE RISK

Low Risk

Why list_modules needs a policy

This tool performs data retrieval only ('lists modules from cached bundle'). It does not create, modify, delete, or execute any operations. The action is non-destructive and non-intrusive, making it a straightforward Read category tool.

From the tool's definition Tool 'list_modules' retrieves and lists modules from a cached bundle—a read-only query operation with no modification, deletion, or execution side effects.

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

POLICY

How to control list_modules

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

policy.json

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

list_modules 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 Deobfuscate MCP Server — 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 Deobfuscate MCP Server tools

Read analyze_structure Returns structural summary (AST) of code. Read deobfuscate Unpacks/deobfuscates minified code & caches result. Read format_code Formats code with Prettier. Read get_call_graph Generates a call graph for a specific function. Read get_help Get detailed usage info and examples for a specific tool. Read get_module Gets code for specific module ID from cache. Read get_symbol_source Extracts specific function/class source code. Read list_functions Scans cached modules to list defined functions and classes.

All 10 Deobfuscate MCP Server tools →

Read tools on other servers

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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 list_modules

What does the list_modules tool do? +

Lists modules from cached bundle. It is categorised as a Read tool in the Deobfuscate MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_modules? +

Register the Deobfuscate MCP Server MCP server in PolicyLayer and add a rule for list_modules: 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 Deobfuscate MCP Server. Nothing to install.

What risk level is list_modules? +

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

Can I rate-limit list_modules? +

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

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

list_modules is provided by the Deobfuscate MCP Server MCP server (madebytokens/deobfuscate-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Deobfuscate MCP Server tool call.

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

CHECK YOUR STACK →