session_auto_attach · Ruyipage MCP: Risk & Policy

WHAT IT DOES

What session_auto_attach does on Ruyipage

AI agents invoke session_auto_attach to trigger actions in Ruyipage. 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 session_auto_attach needs a policy

This tool attaches to running browser processes by scanning process signatures, which is an external system operation with significant blast radius — once attached, an AI agent gains control over a live browser session including its tabs, credentials, and browsing context. It triggers an external operation (process attachment) whose effects depend on what processes are running.

From the tool's definition Auto-detect and attach to a running Firefox / ADS / FlowerBrowser by process signature

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

session_auto_attach Rate-limited

session_auto_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": {
    "session_auto_attach": {
      "limits": [
        {
          "counter": "session_auto_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 Ruyipage, so you can run agents against it safely.

FAQ

Questions about session_auto_attach

What does the session_auto_attach tool do? +

Auto-detect and attach to a running Firefox / ADS / FlowerBrowser by process signature. It is categorised as a Execute tool in the Ruyipage MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on session_auto_attach? +

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

What risk level is session_auto_attach? +

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

Can I rate-limit session_auto_attach? +

Yes. Add a rate_limit block to the session_auto_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 session_auto_attach completely? +

Set action: deny in the PolicyLayer policy for session_auto_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 session_auto_attach? +

session_auto_attach is provided by the Ruyipage MCP server (neverl805/ruyipage_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.