deobfuscate_code · JS Reverse MCP: Risk & Policy

WHAT IT DOES

What deobfuscate_code does on JS Reverse MCP

AI agents invoke deobfuscate_code to trigger actions in JS Reverse 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 deobfuscate_code needs a policy

Deobfuscation in this context is not a passive read — it involves executing/transforming JavaScript code through a browser integration environment that supports hook injection and automated workflows. The blast radius is high because processing malicious obfuscated code could trigger unintended execution or expose sensitive data.

From the tool's definition AI-assisted JavaScript deobfuscation — runs code analysis/transformation on potentially obfuscated scripts; server description mentions 'automated hook injection', 'deobfuscation', and 'direct browser integration', indicating active execution in a browser…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

deobfuscate_code Rate-limited

deobfuscate_code 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": {
    "deobfuscate_code": {
      "limits": [
        {
          "counter": "deobfuscate_code_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 JS Reverse MCP, so you can run agents against it safely.

FAQ

Questions about deobfuscate_code

What does the deobfuscate_code tool do? +

AI-assisted JavaScript deobfuscation. It is categorised as a Execute tool in the JS Reverse 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 deobfuscate_code? +

Register the JS Reverse MCP server in PolicyLayer and add a rule for deobfuscate_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 JS Reverse MCP. Nothing to install.

What risk level is deobfuscate_code? +

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

Can I rate-limit deobfuscate_code? +

Yes. Add a rate_limit block to the deobfuscate_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 deobfuscate_code completely? +

Set action: deny in the PolicyLayer policy for deobfuscate_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 deobfuscate_code? +

deobfuscate_code is provided by the JS Reverse MCP server (noone-hub/jsreverser-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.