attach_process · MCP Debug Server MCP: Risk & Policy

WHAT IT DOES

What attach_process does on MCP Debug Server

AI agents invoke attach_process to trigger actions in MCP Debug Server. 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 attach_process needs a policy

Attaching a debugger to a running process is an Execute-level action — it injects control into an arbitrary running process, potentially pausing it, altering its execution context, and enabling further memory inspection or manipulation. This can destabilize or compromise any process on the system, giving it a high blast radius.

From the tool's definition Attach debugger to a process by PID or name

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

attach_process Rate-limited

attach_process 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": {
    "attach_process": {
      "limits": [
        {
          "counter": "attach_process_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 Debug Server, so you can run agents against it safely.

FAQ

Questions about attach_process

What does the attach_process tool do? +

Attach debugger to a process by PID or name (optional if already attached during server start). It is categorised as a Execute tool in the MCP Debug Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on attach_process? +

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

What risk level is attach_process? +

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

Can I rate-limit attach_process? +

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

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

attach_process is provided by the MCP Debug Server MCP server (nickzer0/mcp-debugserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.