adb_stop_app_am

Force stops an Android app on the connected device using 'am force-stop'.

SERVERRenef SOURCEahmeth4n/renef-mcp

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/ahmeth4n-renef-mcp/adb-stop-app-am.md

WHAT IT DOES

What adb_stop_app_am does on Renef

AI agents invoke adb_stop_app_am to trigger actions in Renef. 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.

RISK

Why adb_stop_app_am is rated High

This tool executes a system command (Android Activity Manager's force-stop) that has observable side effects on the device state. While not destructive (the app isn't deleted), it actively terminates a running application process, which is an Execute operation.

From the tool's definition Tool uses 'am force-stop' to force stop an Android app, which is a command execution action that terminates a running process on the device. The description explicitly states it 'Force stops an Android app,' indicating active process termination.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs adb_stop_app_am safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Renef, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For adb_stop_app_am, this is the rule to start with:

adb_stop_app_am Rate-limited

adb_stop_app_am 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_stop_app_am": {
      "limits": [
        {
          "counter": "adb_stop_app_am_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Renef, apply this rule, and every adb_stop_app_am call is checked against it from then on.

FAQ

Questions about adb_stop_app_am

What does the adb_stop_app_am tool do? +

Force stops an Android app on the connected device using 'am force-stop'. It is categorised as a Execute tool in the Renef 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_stop_app_am? +

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

What risk level is adb_stop_app_am? +

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

Can I rate-limit adb_stop_app_am? +

Yes. Add a rate_limit block to the adb_stop_app_am 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_stop_app_am completely? +

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

adb_stop_app_am is provided by the Renef MCP server (ahmeth4n/renef-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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