agent-device

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appstate

Identify the foreground app or activity currently on a connected Android or iOS device, so you can verify what the user is seeing.

Instructions

Show foreground app/activity (Android; iOS answers per command) Times out after 90s.

Input Schema

TableJSON Schema

Name	Required	Description
`udid`	No	Apple device or simulator UDID; the selector that pins one device when several share a name.
`debug`	No	Enable debug diagnostics.
`runId`	No	Lease run identifier.
`device`	No	Device name selector (a UDID belongs in udid, a serial in serial).
`serial`	No	Android, HarmonyOS, or Vega VVD serial selector.
`target`	No	Alias for deviceTarget on commands without a UI target field. Interaction commands reserve target for the UI element.
`tenant`	No	Remote tenant identifier.
`leaseId`	No	Existing lease identifier.
`session`	No	Agent-device session name.
`platform`	No	Platform selector used to resolve a device.
`includeCost`	No	Include per-command agent-cost (cost.wallClockMs, …) in structuredContent. Defaults to off; the default response shape is unchanged.
`deviceTarget`	No	Device target form. Maps to the CLI --target flag.
`responseLevel`	No	Response verbosity: token-cheap digest / default (today) / full. Defaults to default; the default response shape is unchanged.
`mcpOutputFormat`	No	MCP text content format. Defaults to optimized agent-friendly text; use json for JSON text. Structured content is always returned separately.
`androidDeviceAllowlist`	No	Android serial allowlist used for device resolution.

Output Schema

TableJSON Schema

Name	Required	Description	Default
No arguments

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedv0.21.15Sep 25, 2026

changedOutput schema / oneOf

Previous value: -[
-  {
-    "properties": {
-      "appBundleId": {
-        "type": "string"
-      },
-      "appName": {
-        "type": "string"
-      },
-      "device_udid": {
-        "description": "iOS only — the session device UDID.",
-        "type": "string"
-      },
-      "ios_simulator_device_set": {
-        "description": "iOS only — the simulator set path, or null when unknown.",
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "platform": {
-        "enum": [
-          "ios",
-          "macos"
-        ],
-        "type": "string"
-      },
-      "source": {
-        "const": "session",
-        "type": "string"
-      },
-      "surface": {
-        "enum": [
-          "app",
-          "frontmost-app",
-          "desktop",
-          "menubar"
-        ],
-        "type": "string"
-      }
-    },
-    "required": [
-      "platform",
-      "appName",
-      "source",
-      "surface"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "activity": {
-        "type": "string"
-      },
-      "package": {
-        "type": "string"
-      },
-      "platform": {
-        "const": "android",
-        "type": "string"
-      }
-    },
-    "required": [
-      "platform",
-      "package",
-      "activity"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "properties": {
+      "appBundleId": {
+        "type": "string"
+      },
+      "appName": {
+        "type": "string"
+      },
+      "device_udid": {
+        "description": "iOS only — the session device UDID.",
+        "type": "string"
+      },
+      "ios_simulator_device_set": {
+        "description": "iOS only — the simulator set path, or null when unknown.",
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "platform": {
+        "enum": [
+          "ios",
+          "macos"
+        ],
+        "type": "string"
+      },
+      "source": {
+        "description": "runner when a live runner read the session app state; session when the record alone answered.",
+        "enum": [
+          "session",
+          "runner"
+        ],
+        "type": "string"
+      },
+      "state": {
+        "description": "The session app XCUIApplication state as a live runner reads it; absent with source session.",
+        "enum": [
+          "unknown",
+          "notRunning",
+          "runningBackgroundSuspended",
+          "runningBackground",
+          "runningForeground"
+        ],
+        "type": "string"
+      },
+      "surface": {
+        "enum": [
+          "app",
+          "frontmost-app",
+          "desktop",
+          "menubar"
+        ],
+        "type": "string"
+      }
+    },
+    "required": [
+      "platform",
+      "appName",
+      "source",
+      "surface"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "activity": {
+        "type": "string"
+      },
+      "package": {
+        "type": "string"
+      },
+      "platform": {
+        "const": "android",
+        "type": "string"
+      }
+    },
+    "required": [
+      "platform",
+      "package",
+      "activity"
+    ],
+    "type": "object"
+  }
+]

Changed3 schema fields changedv0.21.0Sep 9, 2026

changedInput schema / properties / device / description

Previous value: -"Device name selector."New value: +"Device name selector (a UDID belongs in udid, a serial in serial)."

changedInput schema / properties / serial / description

Previous value: -"Android device or Vega VVD serial selector."New value: +"Android, HarmonyOS, or Vega VVD serial selector."

changedInput schema / properties / udid / description

Previous value: -"iOS device UDID selector."New value: +"Apple device or simulator UDID; the selector that pins one device when several share a name."

Changed8 schema fields changedv0.20.10Aug 26, 2026

removedInput schema / properties / cwd

Removed value: -{
-  "description": "Working directory for command execution.",
-  "type": "string"
-}

removedInput schema / properties / daemonAuthToken

Removed value: -{
-  "description": "Remote daemon auth token.",
-  "type": "string"
-}

removedInput schema / properties / daemonBaseUrl

Removed value: -{
-  "description": "Remote daemon base URL.",
-  "type": "string"
-}

removedInput schema / properties / iosSimulatorDeviceSet

Removed value: -{
-  "description": "iOS simulator device-set path used for device resolution.",
-  "type": "string"
-}

removedInput schema / properties / iosXctestDerivedDataPath

Removed value: -{
-  "description": "Derived data path for external iOS XCTest runner execution.",
-  "type": "string"
-}

removedInput schema / properties / iosXctestEnvDir

Removed value: -{
-  "description": "Writable directory for iOS XCTest runner env overlays.",
-  "type": "string"
-}

removedInput schema / properties / iosXctestrunFile

Removed value: -{
-  "description": "Externally built iOS XCTest runner .xctestrun artifact path.",
-  "type": "string"
-}

removedInput schema / properties / stateDir

Removed value: -{
-  "description": "Agent-device state directory.",
-  "type": "string"
-}

Changed1 schema field changedv0.20.9Aug 19, 2026

changedInput schema / properties / platform / enum

Previous value: -[
-  "apple",
-  "android",
-  "vega",
-  "linux",
-  "web",
-  "ios",
-  "macos"
-]New value: +[
+  "apple",
+  "android",
+  "harmonyos",
+  "vega",
+  "linux",
+  "web",
+  "ios",
+  "macos"
+]

Changed2 schema fields changedv0.20.2Jul 30, 2026

changedInput schema / properties / platform / enum

Previous value: -[
-  "apple",
-  "android",
-  "linux",
-  "web",
-  "ios",
-  "macos"
-]New value: +[
+  "apple",
+  "android",
+  "vega",
+  "linux",
+  "web",
+  "ios",
+  "macos"
+]

changedInput schema / properties / serial / description

Previous value: -"Android serial selector."New value: +"Android device or Vega VVD serial selector."

Changed4 schema fields changedv0.17.11Jul 6, 2026

addedInput schema / properties / includeCost

Added value: +{
+  "description": "Include per-command agent-cost (cost.wallClockMs, …) in structuredContent. Defaults to off; the default response shape is unchanged.",
+  "type": "boolean"
+}

changedInput schema / properties / platform / enum

Previous value: -[
-  "ios",
-  "macos",
-  "android",
-  "linux",
-  "web",
-  "apple"
-]New value: +[
+  "apple",
+  "android",
+  "linux",
+  "web",
+  "ios",
+  "macos"
+]

addedInput schema / properties / responseLevel

Added value: +{
+  "description": "Response verbosity: token-cheap digest / default (today) / full. Defaults to default; the default response shape is unchanged.",
+  "enum": [
+    "digest",
+    "default",
+    "full"
+  ],
+  "type": "string"
+}

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "oneOf": [
+    {
+      "properties": {
+        "appBundleId": {
+          "type": "string"
+        },
+        "appName": {
+          "type": "string"
+        },
+        "device_udid": {
+          "description": "iOS only — the session device UDID.",
+          "type": "string"
+        },
+        "ios_simulator_device_set": {
+          "description": "iOS only — the simulator set path, or null when unknown.",
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "platform": {
+          "enum": [
+            "ios",
+            "macos"
+          ],
+          "type": "string"
+        },
+        "source": {
+          "const": "session",
+          "type": "string"
+        },
+        "surface": {
+          "enum": [
+            "app",
+            "frontmost-app",
+            "desktop",
+            "menubar"
+          ],
+          "type": "string"
+        }
+      },
+      "required": [
+        "platform",
+        "appName",
+        "source",
+        "surface"
+      ],
+      "type": "object"
+    },
+    {
+      "properties": {
+        "activity": {
+          "type": "string"
+        },
+        "package": {
+          "type": "string"
+        },
+        "platform": {
+          "const": "android",
+          "type": "string"
+        }
+      },
+      "required": [
+        "platform",
+        "package",
+        "activity"
+      ],
+      "type": "object"
+    }
+  ],
+  "type": "object"
+}

Changed1 schema field changedv0.17.7Jun 23, 2026

changedInput schema / properties / platform / enum

Previous value: -[
-  "ios",
-  "macos",
-  "android",
-  "linux",
-  "apple"
-]New value: +[
+  "ios",
+  "macos",
+  "android",
+  "linux",
+  "web",
+  "apple"
+]

Changed5 schema fields changedv0.17.6Jun 18, 2026

addedInput schema / properties / iosXctestDerivedDataPath

Added value: +{
+  "description": "Derived data path for external iOS XCTest runner execution.",
+  "type": "string"
+}

addedInput schema / properties / iosXctestEnvDir

Added value: +{
+  "description": "Writable directory for iOS XCTest runner env overlays.",
+  "type": "string"
+}

addedInput schema / properties / iosXctestrunFile

Added value: +{
+  "description": "Externally built iOS XCTest runner .xctestrun artifact path.",
+  "type": "string"
+}

addedInput schema / properties / mcpOutputFormat

Added value: +{
+  "description": "MCP text content format. Defaults to optimized agent-friendly text; use json for JSON text. Structured content is always returned separately.",
+  "enum": [
+    "optimized",
+    "json"
+  ],
+  "type": "string"
+}

changedInput schema / properties / platform / enum

Previous value: -[
-  "ios",
-  "android",
-  "macos",
-  "linux",
-  "apple"
-]New value: +[
+  "ios",
+  "macos",
+  "android",
+  "linux",
+  "apple"
+]

First observedv0.16.9Jun 3, 2026

TDQS

B3.3/5.0

Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations are absent, so the description carries the behavioral burden. It adds two useful traits: the 90-second timeout and the platform-dependent behavior. However, it does not disclose what happens on unsupported platforms, whether device access or permissions are required, or what failure modes exist, so transparency is only partial.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two short sentences with no filler. It front-loads the purpose and adds a concrete timeout detail in the second sentence, making it well-sized and readable.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The output schema and fully documented parameters compensate for much of the missing detail. Still, the platform caveat is vague, and the absence of usage guidance leaves an agent without enough context to confidently choose and invoke this tool over siblings.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

All 15 parameters are documented in the schema with 100% coverage, so the description does not need to repeat them. It also does not add extra parameter-level meaning, so the baseline score of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description names a specific verb and resource: 'Show foreground app/activity', and adds platform scope for Android and iOS. It is clear enough to identify the tool's purpose, though 'iOS answers per command' is slightly cryptic and it does not explicitly distinguish the tool from siblings like snapshot or apps.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

There is no guidance on when to use this tool versus alternatives, no prerequisites, and no explicit exclusion. The platform note is behavioral information, not a usage rule, and the description does not mention cases where a different command, such as snapshot or apps, would be more appropriate.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Deploy Server

appstate

Instructions

Input Schema

Output Schema

Schema Changelog

TDQS

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