attach · Frida MCP: Risk & Policy

WHAT IT DOES

What attach does on Frida

AI agents invoke attach 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 attach needs a policy

Attaching Frida to a process is an Execute-category action because it triggers an external operation (process attachment) that enables subsequent dynamic instrumentation, code injection, and memory inspection of the target process. This carries high severity because an AI agent could misuse it to attach to sensitive system processes, enabling surveillance, data exfiltration, or manipulation of running software.

From the tool's definition 'Attach Frida to a process' — attaches a dynamic instrumentation framework to a running process, enabling code injection and runtime manipulation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

attach Rate-limited

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

FAQ

Questions about attach

What does the attach tool do? +

Attach Frida to a process. AI MUST call this first, and MUST call it again whenever any other tool reports that the process is detached or crashed. 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 attach? +

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

What risk level is attach? +

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

Can I rate-limit attach? +

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

Set action: deny in the PolicyLayer policy for 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 attach? +

attach 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.