avd_restart · AVD MCP Server MCP: Risk & Policy

WHAT IT DOES

What avd_restart does on AVD MCP Server

AI agents invoke avd_restart to trigger actions in AVD MCP 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 avd_restart needs a policy

This tool triggers external operations (kill and restart processes) on the AVD emulator, which are side effects that modify the state of running systems. It is not merely querying data (Read), nor is it persistently creating/modifying stored data (Write). The restart operation with configurable boot options and telemetry makes it an Execute action.

From the tool's definition Tool description states it 'Reinicia um emulador (kill + start)' - restarts an Android Virtual Device emulator by killing and starting it.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

avd_restart Rate-limited

avd_restart 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": {
    "avd_restart": {
      "limits": [
        {
          "counter": "avd_restart_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 AVD MCP Server, so you can run agents against it safely.

FAQ

Questions about avd_restart

What does the avd_restart tool do? +

Reinicia um emulador (kill + start) com opções de boot e telemetria de duração. It is categorised as a Execute tool in the AVD MCP 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 avd_restart? +

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

What risk level is avd_restart? +

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

Can I rate-limit avd_restart? +

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

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

avd_restart is provided by the AVD MCP Server MCP server (jramalho/avd-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.