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title Tools and MCP

Tools and MCP

Built-in device tools

Tool Description
get_time Current time / date
set_alarm / cancel_alarm Device alarms
open_app Launch by package name
search_web Browser search
get_weather Weather lookup
send_sms SMS compose/send
open_settings System settings
take_screenshot Capture via MediaProjection
generate_image On-device diffusion image generation (Android)

Definitions: lib/tools/tool_definitions.dart
Native: android/.../ToolExecutor.kt

Progress streams over EventChannel('dev.nova.assistant/tools_progress').

Dart-side tools

Tasks and notes are executed in Dart (TaskService, NoteService) without native code.

MCP

Nova supports:

  • HTTP + SSE (legacy MCP transport)
  • stdio (local process; Node required on device/host)

Not yet: Streamable HTTP + OAuth (e.g. Have I Been Pwned returns HTTP 405 on legacy GET SSE).

Configure servers in Settings → MCP. On connect failure, the UI shows a clear error.

Screenshot / vision

  1. Grant MediaProjection when prompted
  2. For assistant-mode capture on Android 14+ / some OEMs, see Assistant mode (PROJECT_MEDIA AppOps)
  3. Tool or UI requests capture → ScreenshotService.requestCapture()
  4. Bytes fetched via screenshot MethodChannel
  5. Orchestrator attaches Message.withImage when the active engine supports vision