# device_set

Select active device for subsequent commands. Sets global state — all following tool calls will target this device until changed. For parallel multi-device workflows, prefer passing deviceId directly to each tool call instead of using device_set, which avoids race conditions from shared mutable state.

Agent View of the PolicyLayer registry record for `device_set`. HTML page: https://policylayer.com/tools/alexgladkov-claude-in-mobile/device-set

## Facts

- Tool: `device_set`
- Server: Claude Mobile (`alexgladkov/claude-in-mobile`) — https://policylayer.com/tools/alexgladkov-claude-in-mobile.md
- Homepage: https://github.com/AlexGladkov/claude-in-mobile
- Risk category: Write (Medium risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "device_set",
    "arguments": {}
  }
}
```

## Why device_set is rated Medium

This tool modifies mutable global state (the active device setting) that persists across subsequent tool invocations. While it doesn't directly execute actions or delete data, changing the active device target can redirect all future operations to a different device, potentially causing commands intended for one device to execute on another.

From the tool's own definition: "device_set 'Sets global state — all following tool calls will target this device' and is used to configure which device subsequent commands target"

## Use case

AI agents use device_set to create or update resources in Claude Mobile, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Claude Mobile environment.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Claude Mobile:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "device_set": {
      "limits": [
        {
          "counter": "device_set_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Claude Mobile (197)

- `browser_clear_session` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/browser-clear-session.md
- `debug_remove_break` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/debug-remove-break.md
- `network_proxy` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/network-proxy.md
- `permission_reset` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/permission-reset.md
- `permission_revoke` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/permission-revoke.md
- `recorder` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/recorder.md
- `recorder_delete` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/recorder-delete.md
- `recorder_remove_step` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/recorder-remove-step.md
- `repl_kill` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/repl-kill.md
- `rustore_discard` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/rustore-discard.md
- `sensor_battery` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/sensor-battery.md
- `store_discard` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/store-discard.md
- `sync_destroy` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/sync-destroy.md
- `system_clear_logs` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/system-clear-logs.md
- `visual` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/visual.md
- `visual_delete` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/visual-delete.md
- `app` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/app.md
- `app_install` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/app-install.md
- `app_launch` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/app-launch.md
- `app_restart` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/app-restart.md
- `app_stop` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/app-stop.md
- `appstore_build` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/appstore-build.md
- `appstore_submit` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/appstore-submit.md
- `appstore_upload` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/appstore-upload.md
- `autopilot` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/autopilot.md
- `autopilot_explore` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/autopilot-explore.md
- `autopilot_heal` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/autopilot-heal.md
- `browser` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/browser.md
- `browser_click` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/browser-click.md
- `browser_close` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/browser-close.md
- …and 167 more: https://policylayer.com/tools/alexgladkov-claude-in-mobile.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=alexgladkov-claude-in-mobile · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/alexgladkov-claude-in-mobile