pause_or_resume · JS Reverse MCP: Risk & Policy

WHAT IT DOES

What pause_or_resume does on JS Reverse MCP

AI agents invoke pause_or_resume 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 pause_or_resume needs a policy

This tool directly controls JavaScript execution state in a browser/runtime environment — pausing or resuming code execution. This is an active execution control operation that affects runtime behavior, qualifying as Execute. Misuse could interrupt or unblock critical JavaScript workflows, but it is not destructive or financial in nature.

From the tool's definition Toggles JavaScript execution. If paused, resumes execution. If running, requests a pause at the next JavaScript statement.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pause_or_resume Rate-limited

pause_or_resume 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": {
    "pause_or_resume": {
      "limits": [
        {
          "counter": "pause_or_resume_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 pause_or_resume

What does the pause_or_resume tool do? +

Toggles JavaScript execution. If paused, resumes execution. If running, requests a pause at the next JavaScript statement. 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 pause_or_resume? +

Register the JS Reverse MCP server in PolicyLayer and add a rule for pause_or_resume: 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 pause_or_resume? +

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

Can I rate-limit pause_or_resume? +

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

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

pause_or_resume is provided by the JS Reverse MCP server (zhizhuodemao/js-reverse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.