detach · Frida MCP: Risk & Policy

WHAT IT DOES

What detach does on Frida

AI agents invoke detach to trigger actions in Frida. 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 detach needs a policy

Detaching Frida and unloading all persistent scripts terminates active instrumentation sessions and removes injected code from the target process. This is an external operation that affects the running state of a process (stopping hooks, probes, and instrumentation), making it Execute.

From the tool's definition Detach Frida from the current process and unload all persistent scripts

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

detach Rate-limited

detach 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": {
    "detach": {
      "limits": [
        {
          "counter": "detach_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 Frida, so you can run agents against it safely.

FAQ

Questions about detach

What does the detach tool do? +

Detach Frida from the current process and unload all persistent scripts. Call this when finished with the target or before attaching to a different process. After detach you MUST call. It is categorised as a Execute tool in the Frida MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on detach? +

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

What risk level is detach? +

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

Can I rate-limit detach? +

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

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

detach is provided by the Frida MCP server (snowluma/mcp-frida). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.