adb_shell · AVD MCP Server MCP: Risk & Policy

WHAT IT DOES

What adb_shell does on AVD MCP Server

AI agents invoke adb_shell 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 adb_shell needs a policy

This tool enables execution of arbitrary shell commands on an Android Virtual Device through adb. While described as operating in 'safe mode', adb shell provides broad command execution capabilities that could be leveraged to install malware, exfiltrate data, modify system files, or compromise the development environment.

From the tool's definition Tool executes 'adb shell' commands with access to Android Virtual Device shell environment. Description states 'Executa comando adb shell em safe mode' (Executes adb shell command in safe mode).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

adb_shell Rate-limited

adb_shell 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": {
    "adb_shell": {
      "limits": [
        {
          "counter": "adb_shell_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 adb_shell

What does the adb_shell tool do? +

Executa comando adb shell em safe mode. 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 adb_shell? +

Register the AVD MCP Server MCP server in PolicyLayer and add a rule for adb_shell: 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 adb_shell? +

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

Can I rate-limit adb_shell? +

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

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

adb_shell 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.