debug_attach · Polybugger MCP: Risk & Policy

WHAT IT DOES

What debug_attach does on Polybugger

AI agents invoke debug_attach to trigger actions in Polybugger. 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 debug_attach needs a policy

Based on the tool name and server context (a multi-language debugger), 'debug_attach' most likely attaches a debugger to a running process, which is an Execute-level operation — it interacts with and can control external processes. The sibling tool 'debug_container_attach' suggests this is a similar but non-container variant.

From the tool's definition Tool name 'debug_attach' on a multi-language debugger MCP server; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

debug_attach Rate-limited

debug_attach 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": {
    "debug_attach": {
      "limits": [
        {
          "counter": "debug_attach_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 Polybugger, so you can run agents against it safely.

FAQ

Questions about debug_attach

What does the debug_attach tool do? +

debug_attach. It is categorised as a Execute tool in the Polybugger MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on debug_attach? +

Register the Polybugger MCP server in PolicyLayer and add a rule for debug_attach: 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 Polybugger. Nothing to install.

What risk level is debug_attach? +

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

Can I rate-limit debug_attach? +

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

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

debug_attach is provided by the Polybugger MCP server (wilfoa/polybugger-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.