js_analyze_vm

Analyze JSVMP/VM interpreter: dispatch type, handler table, opcode map.

SERVERJshookmcp SOURCE@jshookmcp/jshook

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-vmoranv-jshookmcp/js-analyze-vm.md

WHAT IT DOES

What js_analyze_vm does on Jshookmcp

AI agents call js_analyze_vm to retrieve information from Jshookmcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why js_analyze_vm is rated Low

Static analysis of VM internals produces no code execution or data modification side effects.

From the tool's definition Analyze JSVMP/VM interpreter: dispatch type, handler table, opcode map.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs js_analyze_vm safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Jshookmcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For js_analyze_vm, this is the rule to start with:

js_analyze_vm Allowed

js_analyze_vm is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Jshookmcp, apply this rule, and every js_analyze_vm call is checked against it from then on.

FAQ

Questions about js_analyze_vm

What does the js_analyze_vm tool do? +

Analyze JSVMP/VM interpreter: dispatch type, handler table, opcode map. It is categorised as a Read tool in the Jshookmcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on js_analyze_vm? +

Register the Jshook MCP server in PolicyLayer and add a rule for js_analyze_vm: 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 Jshookmcp. Nothing to install.

What risk level is js_analyze_vm? +

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

Can I rate-limit js_analyze_vm? +

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

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

js_analyze_vm is provided by the Jshook MCP server (@jshookmcp/jshook). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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