resume_execution · MCP JS Debugger MCP: Risk & Policy

WHAT IT DOES

What resume_execution does on MCP JS Debugger

AI agents invoke resume_execution to trigger actions in MCP JS Debugger. 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 resume_execution needs a policy

This tool controls program execution flow by resuming a paused JavaScript/TypeScript process. It triggers external runtime operations and can cause arbitrary code to run in the debugged application. Misuse could allow unintended code paths to execute, making it an Execute-category tool with medium severity.

From the tool's definition Resumes execution after being paused at a breakpoint or by pause_execution

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

resume_execution Rate-limited

resume_execution 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": {
    "resume_execution": {
      "limits": [
        {
          "counter": "resume_execution_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 MCP JS Debugger, so you can run agents against it safely.

FAQ

Questions about resume_execution

What does the resume_execution tool do? +

Resumes execution after being paused at a breakpoint or by pause_execution. It is categorised as a Execute tool in the MCP JS Debugger MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on resume_execution? +

Register the MCP JS Debugger MCP server in PolicyLayer and add a rule for resume_execution: 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 MCP JS Debugger. Nothing to install.

What risk level is resume_execution? +

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

Can I rate-limit resume_execution? +

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

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

resume_execution is provided by the MCP JS Debugger MCP server (johngrimes/mcp-js-debugger). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.