agent-device

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press

Short-press a UI target by snapshot ref, selector, or coordinates. Use longpress instead when the target requires a context-menu or hold gesture.

Instructions

Short-press a UI target by snapshot ref, selector, or coordinates. Use longpress instead when the target requires a context-menu or hold gesture. Success means the press was dispatched, not that it landed: use settle or verify to confirm the result, or wait for the expected screen. A ref or selector target is re-checked for motion before dispatch when the session's previous action just animated the screen, and is dispatched at its resting position; one that has not stopped refuses with target_still_moving rather than acting where it was. Times out after 90s; a caller-supplied budget extends it.

Input Schema

Name	Required	Description
`raw`	No	Use raw snapshot data during selector resolution.
`udid`	No	Apple device or simulator UDID; the selector that pins one device when several share a name.
`count`	No	Number of press/click repetitions.
`debug`	No	Enable debug diagnostics.
`depth`	No	Snapshot traversal depth.
`runId`	No	Lease run identifier.
`scope`	No	Snapshot scope selector used before resolution.
`device`	No	Device name selector (a UDID belongs in udid, a serial in serial).
`holdMs`	No	Hold duration for each action.
`serial`	No	Android, HarmonyOS, or Vega VVD serial selector.
`settle`	No	After the action, wait for the UI to go quiet and return the settled diff vs the pre-action tree in the same response. Best-effort; never fails the action.
`target`	Yes	UI target. This is separate from deviceTarget, which selects the device form.
`tenant`	No	Remote tenant identifier.
`verify`	No	Capture cheap post-action evidence (AX digest, node counts, changedFromBefore) instead of a follow-up snapshot.
`leaseId`	No	Existing lease identifier.
`session`	No	Agent-device session name.
`jitterPx`	No	Deterministic per-axis coordinate jitter in pixels (each press offsets x and y by up to this amount).
`noRecord`	No	Do not record this action.
`platform`	No	Platform selector used to resolve a device.
`doubleTap`	No	Request a double-tap action.
`timeoutMs`	No	Settle: wait deadline in milliseconds (default 10000).
`intervalMs`	No	Delay between repeated press/click actions.
`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.
`settleQuietMs`	No	Settle: quiet window in milliseconds (default 500; 300 when the settled tree comes from the iOS simulator snapshot bridge). On iOS, a broad screen replacement such as a modal dismissal is confirmed for at least 1500ms whatever window is asked for, within the timeoutMs settle deadline; a replacement from a screen the pre-action capture read as presenting nothing, such as a tab switch, gets no 1500ms confirmation and keeps the asked window.
`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

Name	Required	Description
`x`	No	Resolved interaction x coordinate when available.
`y`	No	Resolved interaction y coordinate when available.
`ref`	No	Snapshot ref without the @ prefix when the target was an @ref.
`cost`	No
`hint`	No
`count`	No	Number of press/click repetitions.
`button`	No
`holdMs`	No	Hold duration for each action.
`settle`	No
`message`	No
`warning`	No
`evidence`	No
`jitterPx`	No	Deterministic per-axis coordinate jitter in pixels (each press offsets x and y by up to this amount).
`refLabel`	No
`selector`	No	Selector expression when the target was a selector.
`doubleTap`	No	Whether the command requested a double-tap action.
`intervalMs`	No	Delay between repeated press/click actions.
`resolution`	No	Pre-action disclosure of how the acting path resolved its target. Absent when resolutionDisclosure is inapplicable for the path.
`targetKind`	Yes	Resolved interaction target kind.
`selectorChain`	No
`referenceWidth`	No	Reference frame width for visualizing the interaction point.
`targetHittable`	No
`referenceHeight`	No	Reference frame height for visualizing the interaction point.
`maestroFallbackReason`	No
`maestroNonHittableCoordinateFallbackUsed`	No	Whether the direct iOS Maestro coordinate fallback was actually used.
`maestroNonHittableCoordinateFallbackAllowed`	No	Whether the direct iOS Maestro coordinate fallback was allowed for this selector.

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedv0.21.29Oct 23, 2026

changedInput schema / properties / jitterPx / description

Previous value: -"Randomization radius in pixels."New value: +"Deterministic per-axis coordinate jitter in pixels (each press offsets x and y by up to this amount)."

changedOutput schema / properties / jitterPx / description

Previous value: -"Randomization radius in pixels."New value: +"Deterministic per-axis coordinate jitter in pixels (each press offsets x and y by up to this amount)."

Changed1 schema field changedv0.21.28Oct 15, 2026

changedInput schema / properties / settleQuietMs / description

Previous value: -"Settle: quiet window in milliseconds (default 500)."New value: +"Settle: quiet window in milliseconds (default 500; 300 when the settled tree comes from the iOS simulator snapshot bridge). On iOS, a broad screen replacement such as a modal dismissal is confirmed for at least 1500ms whatever window is asked for, within the timeoutMs settle deadline; a replacement from a screen the pre-action capture read as presenting nothing, such as a tab switch, gets no 1500ms confirmation and keeps the asked window."

Changed3 schema fields changedv0.21.2Sep 16, 2026

changedOutput schema / properties / evidence / properties / changedFromBefore / description

Previous value: -"Whether the post-action digest differs from the pre-action capture digest. false is evidence, not failure."New value: +"Whether the post-action digest differs from the pre-action capture digest. false is evidence, not failure. With surfaceChange present, no digest comparison is made: it reports that surface transition."

addedOutput schema / properties / evidence / properties / surfaceChange

Added value: +{
+  "description": "Present when an in-place system surface (web sign-in or Apple Pay sheet) was presented over the app, or left it.",
+  "properties": {
+    "disclosure": {
+      "description": "Agent-facing sentence explaining the surface transition.",
+      "type": "string"
+    },
+    "from": {
+      "description": "Surface the pre-action baseline described: a host bundle id, or app.",
+      "type": "string"
+    },
+    "to": {
+      "description": "Surface the post-action capture describes: a host bundle id, or app.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "from",
+    "to",
+    "disclosure"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / settle / properties / surfaceChange

Added value: +{
+  "description": "Present when an in-place system surface (web sign-in or Apple Pay sheet) was presented over the app, or left it.",
+  "properties": {
+    "disclosure": {
+      "description": "Agent-facing sentence explaining the surface transition.",
+      "type": "string"
+    },
+    "from": {
+      "description": "Surface the pre-action baseline described: a host bundle id, or app.",
+      "type": "string"
+    },
+    "to": {
+      "description": "Surface the post-action capture describes: a host bundle id, or app.",
+      "type": "string"
+    }
+  },
+  "required": [
+    "from",
+    "to",
+    "disclosure"
+  ],
+  "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"
-}

Changed2 schema fields 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"
+]

changedOutput schema / properties / resolution / oneOf

Previous value: -[
-  {
-    "properties": {
-      "kind": {
-        "const": "unique",
-        "type": "string"
-      },
-      "phase": {
-        "const": "pre-action",
-        "type": "string"
-      },
-      "source": {
-        "const": "runtime",
-        "type": "string"
-      }
-    },
-    "required": [
-      "source",
-      "phase",
-      "kind"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "alternatives": {
-        "description": "At most 5 losing candidates, document order. Present at default/full response levels and omitted in digest. The winner is never included.",
-        "items": {
-          "properties": {
-            "diagnosticRef": {
-              "description": "Opaque non-@ diagnostic token. Never a snapshot ref: not issued via refsGeneration and cannot be pinned or reused as an @ref target. UTF-8 truncated to 256 bytes.",
-              "type": "string"
-            },
-            "label": {
-              "description": "UTF-8 truncated to 256 bytes.",
-              "type": "string"
-            },
-            "role": {
-              "description": "UTF-8 truncated to 256 bytes.",
-              "type": "string"
-            }
-          },
-          "required": [
-            "diagnosticRef"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "kind": {
-        "const": "disambiguated",
-        "type": "string"
-      },
-      "matchCount": {
-        "description": "Total matches resolveSelectorChain found before disambiguation.",
-        "type": "number"
-      },
-      "phase": {
-        "const": "pre-action",
-        "type": "string"
-      },
-      "source": {
-        "const": "runtime",
-        "type": "string"
-      },
-      "tiebreak": {
-        "description": "The comparison that decided the winner.",
-        "enum": [
-          "visible",
-          "deepest",
-          "smallest-area"
-        ],
-        "type": "string"
-      },
-      "winnerDiagnostic": {
-        "properties": {
-          "diagnosticRef": {
-            "description": "Opaque non-@ diagnostic token. Never a snapshot ref: not issued via refsGeneration and cannot be pinned or reused as an @ref target. UTF-8 truncated to 256 bytes.",
-            "type": "string"
-          },
-          "label": {
-            "description": "UTF-8 truncated to 256 bytes.",
-            "type": "string"
-          },
-          "role": {
-            "description": "UTF-8 truncated to 256 bytes.",
-            "type": "string"
-          }
-        },
-        "required": [
-          "diagnosticRef"
-        ],
-        "type": "object"
-      }
-    },
-    "required": [
-      "source",
-      "phase",
-      "kind",
-      "matchCount",
-      "winnerDiagnostic",
-      "tiebreak"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "kind": {
-        "const": "exact",
-        "type": "string"
-      },
-      "phase": {
-        "const": "pre-action",
-        "type": "string"
-      },
-      "source": {
-        "const": "ref",
-        "type": "string"
-      }
-    },
-    "required": [
-      "source",
-      "phase",
-      "kind"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "kind": {
-        "const": "label-fallback",
-        "type": "string"
-      },
-      "phase": {
-        "const": "pre-action",
-        "type": "string"
-      },
-      "source": {
-        "const": "ref",
-        "type": "string"
-      }
-    },
-    "required": [
-      "source",
-      "phase",
-      "kind"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "kind": {
-        "const": "not-observed",
-        "type": "string"
-      },
-      "source": {
-        "const": "direct-ios",
-        "type": "string"
-      }
-    },
-    "required": [
-      "source",
-      "kind"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "properties": {
+      "kind": {
+        "const": "unique",
+        "type": "string"
+      },
+      "phase": {
+        "const": "pre-action",
+        "type": "string"
+      },
+      "source": {
+        "const": "runtime",
+        "type": "string"
+      }
+    },
+    "required": [
+      "source",
+      "phase",
+      "kind"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "alternatives": {
+        "description": "At most 5 losing candidates, document order. Present at default/full response levels and omitted in digest. The winner is never included.",
+        "items": {
+          "properties": {
+            "diagnosticRef": {
+              "description": "Opaque non-@ diagnostic token. Never a snapshot ref: not issued via refsGeneration and cannot be pinned or reused as an @ref target. UTF-8 truncated to 256 bytes.",
+              "type": "string"
+            },
+            "label": {
+              "description": "UTF-8 truncated to 256 bytes.",
+              "type": "string"
+            },
+            "role": {
+              "description": "UTF-8 truncated to 256 bytes.",
+              "type": "string"
+            }
+          },
+          "required": [
+            "diagnosticRef"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "kind": {
+        "const": "disambiguated",
+        "type": "string"
+      },
+      "matchCount": {
+        "description": "Total matches resolveSelectorChain found before disambiguation.",
+        "type": "number"
+      },
+      "phase": {
+        "const": "pre-action",
+        "type": "string"
+      },
+      "source": {
+        "const": "runtime",
+        "type": "string"
+      },
+      "tiebreak": {
+        "description": "The comparison that decided the winner.",
+        "enum": [
+          "visible",
+          "deepest",
+          "smallest-area",
+          "structural-equivalence"
+        ],
+        "type": "string"
+      },
+      "winnerDiagnostic": {
+        "properties": {
+          "diagnosticRef": {
+            "description": "Opaque non-@ diagnostic token. Never a snapshot ref: not issued via refsGeneration and cannot be pinned or reused as an @ref target. UTF-8 truncated to 256 bytes.",
+            "type": "string"
+          },
+          "label": {
+            "description": "UTF-8 truncated to 256 bytes.",
+            "type": "string"
+          },
+          "role": {
+            "description": "UTF-8 truncated to 256 bytes.",
+            "type": "string"
+          }
+        },
+        "required": [
+          "diagnosticRef"
+        ],
+        "type": "object"
+      }
+    },
+    "required": [
+      "source",
+      "phase",
+      "kind",
+      "matchCount",
+      "winnerDiagnostic",
+      "tiebreak"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "kind": {
+        "const": "exact",
+        "type": "string"
+      },
+      "phase": {
+        "const": "pre-action",
+        "type": "string"
+      },
+      "source": {
+        "const": "ref",
+        "type": "string"
+      }
+    },
+    "required": [
+      "source",
+      "phase",
+      "kind"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "kind": {
+        "const": "label-fallback",
+        "type": "string"
+      },
+      "phase": {
+        "const": "pre-action",
+        "type": "string"
+      },
+      "source": {
+        "const": "ref",
+        "type": "string"
+      }
+    },
+    "required": [
+      "source",
+      "phase",
+      "kind"
+    ],
+    "type": "object"
+  },
+  {
+    "properties": {
+      "kind": {
+        "const": "not-observed",
+        "type": "string"
+      },
+      "source": {
+        "const": "direct-ios",
+        "type": "string"
+      }
+    },
+    "required": [
+      "source",
+      "kind"
+    ],
+    "type": "object"
+  }
+]

Changed9 schema fields changedv0.20.2Jul 30, 2026

addedInput schema / properties / noRecord

Added value: +{
+  "description": "Do not record this action.",
+  "type": "boolean"
+}

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."

addedInput schema / properties / settle

Added value: +{
+  "description": "After the action, wait for the UI to go quiet and return the settled diff vs the pre-action tree in the same response. Best-effort; never fails the action.",
+  "type": "boolean"
+}

addedInput schema / properties / settleQuietMs

Added value: +{
+  "description": "Settle: quiet window in milliseconds (default 500).",
+  "minimum": 0,
+  "type": "integer"
+}

addedInput schema / properties / timeoutMs

Added value: +{
+  "description": "Settle: wait deadline in milliseconds (default 10000).",
+  "minimum": 1,
+  "type": "integer"
+}

removedOutput schema / oneOf

Removed value: -[
-  {
-    "properties": {
-      "backendResult": {
-        "additionalProperties": true,
-        "description": "Raw backend result passthrough.",
-        "type": "object"
-      },
-      "evidence": {
-        "properties": {
-          "changedFromBefore": {
-            "description": "Whether the post-action digest differs from the pre-action capture digest. false is evidence, not failure.",
-            "type": "boolean"
-          },
-          "digest": {
-            "description": "Order-independent digest of the post-action node multiset.",
-            "type": "string"
-          },
-          "foregroundApp": {
-            "description": "Foreground app bundle id or name, when the capture carries it.",
-            "type": "string"
-          },
-          "interactiveNodeCount": {
-            "description": "Subset of nodeCount the platform reports as hittable.",
-            "type": "number"
-          },
-          "nodeCount": {
-            "description": "Node count in the post-action interactive-only capture.",
-            "type": "number"
-          }
-        },
-        "required": [
-          "nodeCount",
-          "interactiveNodeCount",
-          "digest",
-          "changedFromBefore"
-        ],
-        "type": "object"
-      },
-      "kind": {
-        "const": "point",
-        "type": "string"
-      },
-      "message": {
-        "type": "string"
-      },
-      "point": {
-        "properties": {
-          "x": {
-            "type": "number"
-          },
-          "y": {
-            "type": "number"
-          }
-        },
-        "required": [
-          "x",
-          "y"
-        ],
-        "type": "object"
-      },
-      "warning": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "kind",
-      "point"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "backendResult": {
-        "additionalProperties": true,
-        "description": "Raw backend result passthrough.",
-        "type": "object"
-      },
-      "evidence": {
-        "properties": {
-          "changedFromBefore": {
-            "description": "Whether the post-action digest differs from the pre-action capture digest. false is evidence, not failure.",
-            "type": "boolean"
-          },
-          "digest": {
-            "description": "Order-independent digest of the post-action node multiset.",
-            "type": "string"
-          },
-          "foregroundApp": {
-            "description": "Foreground app bundle id or name, when the capture carries it.",
-            "type": "string"
-          },
-          "interactiveNodeCount": {
-            "description": "Subset of nodeCount the platform reports as hittable.",
-            "type": "number"
-          },
-          "nodeCount": {
-            "description": "Node count in the post-action interactive-only capture.",
-            "type": "number"
-          }
-        },
-        "required": [
-          "nodeCount",
-          "interactiveNodeCount",
-          "digest",
-          "changedFromBefore"
-        ],
-        "type": "object"
-      },
-      "hint": {
-        "type": "string"
-      },
-      "kind": {
-        "const": "ref",
-        "type": "string"
-      },
-      "message": {
-        "type": "string"
-      },
-      "node": {
-        "description": "Resolved snapshot node for the matched element.",
-        "properties": {
-          "appName": {
-            "type": "string"
-          },
-          "bundleId": {
-            "type": "string"
-          },
-          "depth": {
-            "type": "number"
-          },
-          "enabled": {
-            "type": "boolean"
-          },
-          "focused": {
-            "type": "boolean"
-          },
-          "hiddenContentAbove": {
-            "type": "boolean"
-          },
-          "hiddenContentBelow": {
-            "type": "boolean"
-          },
-          "hittable": {
-            "type": "boolean"
-          },
-          "identifier": {
-            "type": "string"
-          },
-          "index": {
-            "type": "number"
-          },
-          "interactionBlocked": {
-            "enum": [
-              "covered"
-            ],
-            "type": "string"
-          },
-          "label": {
-            "type": "string"
-          },
-          "parentIndex": {
-            "type": "number"
-          },
-          "pid": {
-            "type": "number"
-          },
-          "presentationHints": {
-            "items": {
-              "type": "string"
-            },
-            "type": "array"
-          },
-          "rect": {
-            "properties": {
-              "height": {
-                "type": "number"
-              },
-              "width": {
-                "type": "number"
-              },
-              "x": {
-                "type": "number"
-              },
-              "y": {
-                "type": "number"
-              }
-            },
-            "required": [
-              "x",
-              "y",
-              "width",
-              "height"
-            ],
-            "type": "object"
-          },
-          "ref": {
-            "description": "Stable snapshot ref such as e12.",
-            "type": "string"
-          },
-          "role": {
-            "type": "string"
-          },
-          "selected": {
-            "type": "boolean"
-          },
-          "subrole": {
-            "type": "string"
-          },
-          "surface": {
-            "type": "string"
-          },
-          "type": {
-            "type": "string"
-          },
-          "value": {
-            "type": "string"
-          },
-          "visibleToUser": {
-            "type": "boolean"
-          },
-          "windowTitle": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "index",
-          "ref"
-        ],
-        "type": "object"
-      },
-      "point": {
-        "properties": {
-          "x": {
-            "type": "number"
-          },
-          "y": {
-            "type": "number"
-          }
-        },
-        "required": [
-          "x",
-          "y"
-        ],
-        "type": "object"
-      },
-      "refLabel": {
-        "type": "string"
-      },
-      "selectorChain": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "target": {
-        "properties": {
-          "kind": {
-            "const": "ref",
-            "type": "string"
-          },
-          "ref": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "kind",
-          "ref"
-        ],
-        "type": "object"
-      },
-      "targetHittable": {
-        "type": "boolean"
-      },
-      "warning": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "kind",
-      "target"
-    ],
-    "type": "object"
-  },
-  {
-    "properties": {
-      "backendResult": {
-        "additionalProperties": true,
-        "description": "Raw backend result passthrough.",
-        "type": "object"
-      },
-      "evidence": {
-        "properties": {
-          "changedFromBefore": {
-            "description": "Whether the post-action digest differs from the pre-action capture digest. false is evidence, not failure.",
-            "type": "boolean"
-          },
-          "digest": {
-            "description": "Order-independent digest of the post-action node multiset.",
-            "type": "string"
-          },
-          "foregroundApp": {
-            "description": "Foreground app bundle id or name, when the capture carries it.",
-            "type": "string"
-          },
-          "interactiveNodeCount": {
-            "description": "Subset of nodeCount the platform reports as hittable.",
-            "type": "number"
-          },
-          "nodeCount": {
-            "description": "Node count in the post-action interactive-only capture.",
-            "type": "number"
-          }
-        },
-        "required": [
-          "nodeCount",
-          "interactiveNodeCount",
-          "digest",
-          "changedFromBefore"
-        ],
-        "type": "object"
-      },
-      "hint": {
-        "type": "string"
-      },
-      "kind": {
-        "const": "selector",
-        "type": "string"
-      },
-      "message": {
-        "type": "string"
-      },
-      "node": {
-        "description": "Resolved snapshot node for the matched element.",
-        "properties": {
-          "appName": {
-            "type": "string"
-          },
-          "bundleId": {
-            "type": "string"
-          },
-          "depth": {
-            "type": "number"
-          },
-          "enabled": {
-            "type": "boolean"
-          },
-          "focused": {
-            "type": "boolean"
-          },
-          "hiddenContentAbove": {
-            "type": "boolean"
-          },
-          "hiddenContentBelow": {
-            "type": "boolean"
-          },
-          "hittable": {
-            "type": "boolean"
-          },
-          "identifier": {
-            "type": "string"
-          },
-          "index": {
-            "type": "number"
-          },
-          "interactionBlocked": {
-            "enum": [
-              "covered"
-            ],
-            "type": "string"
-          },
-          "label": {
-            "type": "string"
-          },
-          "parentIndex": {
-            "type": "number"
-          },
-          "pid": {
-            "type": "number"
-          },
-          "presentationHints": {
-            "items": {
-              "type": "string"
-            },
-            "type": "array"
-          },
-          "rect": {
-            "properties": {
-              "height": {
-                "type": "number"
-              },
-              "width": {
-                "type": "number"
-              },
-              "x": {
-                "type": "number"
-              },
-              "y": {
-                "type": "number"
-              }
-            },
-            "required": [
-              "x",
-              "y",
-              "width",
-              "height"
-            ],
-            "type": "object"
-          },
-          "ref": {
-            "description": "Stable snapshot ref such as e12.",
-            "type": "string"
-          },
-          "role": {
-            "type": "string"
-          },
-          "selected": {
-            "type": "boolean"
-          },
-          "subrole": {
-            "type": "string"
-          },
-          "surface": {
-            "type": "string"
-          },
-          "type": {
-            "type": "string"
-          },
-          "value": {
-            "type": "string"
-          },
-          "visibleToUser": {
-            "type": "boolean"
-          },
-          "windowTitle": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "index",
-          "ref"
-        ],
-        "type": "object"
-      },
-      "point": {
-        "properties": {
-          "x": {
-            "type": "number"
-          },
-          "y": {
-            "type": "number"
-          }
-        },
-        "required": [
-          "x",
-          "y"
-        ],
-        "type": "object"
-      },
-      "refLabel": {
-        "type": "string"
-      },
-      "selectorChain": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "target": {
-        "properties": {
-          "kind": {
-            "const": "selector",
-            "type": "string"
-          },
-          "selector": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "kind",
-          "selector"
-        ],
-        "type": "object"
-      },
-      "targetHittable": {
-        "type": "boolean"
-      },
-      "warning": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "kind",
-      "point",
-      "target",
-      "node",
-      "selectorChain"
-    ],
-    "type": "object"
-  }
-]

addedOutput schema / properties

Added value: +{
+  "button": {
+    "enum": [
+      "secondary",
+      "middle"
+    ],
+    "type": "string"
+  },
+  "cost": {
+    "properties": {
+      "nodeCount": {
+        "description": "Number of nodes in the original node tree when the response carries one.",
+        "type": "number"
+      },
+      "runnerRoundTrips": {
+        "description": "Number of real runner round-trips made while serving the request.",
+        "type": "number"
+      },
+      "wallClockMs": {
+        "description": "Total wall-clock time for the request in milliseconds.",
+        "type": "number"
+      }
+    },
+    "required": [
+      "wallClockMs",
+      "runnerRoundTrips"
+    ],
+    "type": "object"
+  },
+  "count": {
+    "description": "Number of press/click repetitions.",
+    "type": "number"
+  },
+  "doubleTap": {
+    "description": "Whether the command requested a double-tap action.",
+    "type": "boolean"
+  },
+  "evidence": {
+    "properties": {
+      "changedFromBefore": {
+        "description": "Whether the post-action digest differs from the pre-action capture digest. false is evidence, not failure.",
+        "type": "boolean"
+      },
+      "digest": {
+        "description": "Order-independent digest of the post-action node multiset.",
+        "type": "string"
+      },
+      "foregroundApp": {
+        "description": "Foreground app bundle id or name, when the capture carries it.",
+        "type": "string"
+      },
+      "interactiveNodeCount": {
+        "description": "Subset of nodeCount the platform reports as hittable.",
+        "type": "number"
+      },
+      "nodeCount": {
+        "description": "Node count in the post-action interactive-only capture.",
+        "type": "number"
+      }
+    },
+    "required": [
+      "nodeCount",
+      "interactiveNodeCount",
+      "digest",
+      "changedFromBefore"
+    ],
+    "type": "object"
+  },
+  "hint": {
+    "type": "string"
+  },
+  "holdMs": {
+    "description": "Hold duration for each action.",
+    "type": "number"
+  },
+  "intervalMs": {
+    "description": "Delay between repeated press/click actions.",
+    "type": "number"
+  },
+  "jitterPx": {
+    "description": "Randomization radius in pixels.",
+    "type": "number"
+  },
+  "maestroFallbackReason": {
+    "const": "non-hittable-coordinate",
+    "type": "string"
+  },
+  "maestroNonHittableCoordinateFallbackAllowed": {
+    "description": "Whether the direct iOS Maestro coordinate fallback was allowed for this selector.",
+    "type": "boolean"
+  },
+  "maestroNonHittableCoordinateFallbackUsed": {
+    "description": "Whether the direct iOS Maestro coordinate fallback was actually used.",
+    "type": "boolean"
+  },
+  "message": {
+    "type": "string"
+  },
+  "ref": {
+    "description": "Snapshot ref without the @ prefix when the target was an @ref.",
+    "type": "string"
+  },
+  "refLabel": {
+    "type": "string"
+  },
+  "referenceHeight": {
+    "description": "Reference frame height for visualizing the interaction point.",
+    "type": "number"
+  },
+  "referenceWidth": {
+    "description": "Reference frame width for visualizing the interaction point.",
+    "type": "number"
+  },
+  "resolution": {
+    "description": "Pre-action disclosure of how the acting path resolved its target. Absent when resolutionDisclosure is inapplicable for the path.",
+    "oneOf": [
+      {
+        "properties": {
+          "kind": {
+            "const": "unique",
+            "type": "string"
+          },
+          "phase": {
+            "const": "pre-action",
+            "type": "string"
+          },
+          "source": {
+            "const": "runtime",
+            "type": "string"
+          }
+        },
+        "required": [
+          "source",
+          "phase",
+          "kind"
+        ],
+        "type": "object"
+      },
+      {
+        "properties": {
+          "alternatives": {
+            "description": "At most 5 losing candidates, document order. Present at default/full response levels and omitted in digest. The winner is never included.",
+            "items": {
+              "properties": {
+                "diagnosticRef": {
+                  "description": "Opaque non-@ diagnostic token. Never a snapshot ref: not issued via refsGeneration and cannot be pinned or reused as an @ref target. UTF-8 truncated to 256 bytes.",
+                  "type": "string"
+                },
+                "label": {
+                  "description": "UTF-8 truncated to 256 bytes.",
+                  "type": "string"
+                },
+                "role": {
+                  "description": "UTF-8 truncated to 256 bytes.",
+                  "type": "string"
+                }
+              },
+              "required": [
+                "diagnosticRef"
+              ],
+              "type": "object"
+            },
+            "type": "array"
+          },
+          "kind": {
+            "const": "disambiguated",
+            "type": "string"
+          },
+          "matchCount": {
+            "description": "Total matches resolveSelectorChain found before disambiguation.",
+            "type": "number"
+          },
+          "phase": {
+            "const": "pre-action",
+            "type": "string"
+          },
+          "source": {
+            "const": "runtime",
+            "type": "string"
+          },
+          "tiebreak": {
+            "description": "The comparison that decided the winner.",
+            "enum": [
+              "visible",
+              "deepest",
+              "smallest-area"
+            ],
+            "type": "string"
+          },
+          "winnerDiagnostic": {
+            "properties": {
+              "diagnosticRef": {
+                "description": "Opaque non-@ diagnostic token. Never a snapshot ref: not issued via refsGeneration and cannot be pinned or reused as an @ref target. UTF-8 truncated to 256 bytes.",
+                "type": "string"
+              },
+              "label": {
+                "description": "UTF-8 truncated to 256 bytes.",
+                "type": "string"
+              },
+              "role": {
+                "description": "UTF-8 truncated to 256 bytes.",
+                "type": "string"
+              }
+            },
+            "required": [
+              "diagnosticRef"
+            ],
+            "type": "object"
+          }
+        },
+        "required": [
+          "source",
+          "phase",
+          "kind",
+          "matchCount",
+          "winnerDiagnostic",
+          "tiebreak"
+        ],
+        "type": "object"
+      },
+      {
+        "properties": {
+          "kind": {
+            "const": "exact",
+            "type": "string"
+          },
+          "phase": {
+            "const": "pre-action",
+            "type": "string"
+          },
+          "source": {
+            "const": "ref",
+            "type": "string"
+          }
+        },
+        "required": [
+          "source",
+          "phase",
+          "kind"
+        ],
+        "type": "object"
+      },
+      {
+        "properties": {
+          "kind": {
+            "const": "label-fallback",
+            "type": "string"
+          },
+          "phase": {
+            "const": "pre-action",
+            "type": "string"
+          },
+          "source": {
+            "const": "ref",
+            "type": "string"
+          }
+        },
+        "required": [
+          "source",
+          "phase",
+          "kind"
+        ],
+        "type": "object"
+      },
+      {
+        "properties": {
+          "kind": {
+            "const": "not-observed",
+            "type": "string"
+          },
+          "source": {
+            "const": "direct-ios",
+            "type": "string"
+          }
+        },
+        "required": [
+          "source",
+          "kind"
+        ],
+        "type": "object"
+      }
+    ],
+    "type": "object"
+  },
+  "selector": {
+    "description": "Selector expression when the target was a selector.",
+    "type": "string"
+  },
+  "selectorChain": {
+    "items": {
+      "type": "string"
+    },
+    "type": "array"
+  },
+  "settle": {
+    "properties": {
+      "captures": {
+        "type": "number"
+      },
+      "diff": {
+        "description": "Settled diff vs the pre-action tree (changed lines only).",
+        "properties": {
+          "lines": {
+            "items": {
+              "properties": {
+                "kind": {
+                  "enum": [
+                    "added",
+                    "removed"
+                  ],
+                  "type": "string"
+                },
+                "ref": {
+                  "description": "Plain ref body (e12) for added lines.",
+                  "type": "string"
+                },
+                "text": {
+                  "type": "string"
+                }
+              },
+              "required": [
+                "kind",
+                "text"
+              ],
+              "type": "object"
+            },
+            "type": "array"
+          },
+          "summary": {
+            "properties": {
+              "additions": {
+                "type": "number"
+              },
+              "removals": {
+                "type": "number"
+              },
+              "unchanged": {
+                "type": "number"
+              }
+            },
+            "required": [
+              "additions",
+              "removals",
+              "unchanged"
+            ],
+            "type": "object"
+          },
+          "truncated": {
+            "description": "Lines were capped to the response bound.",
+            "type": "boolean"
+          }
+        },
+        "required": [
+          "summary",
+          "lines"
+        ],
+        "type": "object"
+      },
+      "hint": {
+        "type": "string"
+      },
+      "quietMs": {
+        "type": "number"
+      },
+      "refs": {
+        "items": {
+          "properties": {
+            "ref": {
+              "description": "Plain ref body (e12) minted from the stored settled tree.",
+              "type": "string"
+            }
+          },
+          "required": [
+            "ref"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "refsGeneration": {
+        "description": "Snapshot generation of the stored settled tree; refs on added diff lines were minted from it.",
+        "type": "number"
+      },
+      "settled": {
+        "description": "Whether the UI held the quiet window before the deadline. false is advisory, not failure.",
+        "type": "boolean"
+      },
+      "tail": {
+        "description": "Unchanged interactive refs tail: still-present, actionable elements from the settled tree, attached only when diff carries zero added-line refs (a modal-dismiss/toast-only diff).",
+        "items": {
+          "properties": {
+            "label": {
+              "type": "string"
+            },
+            "ref": {
+              "description": "Plain ref body (e12) minted from the stored settled tree.",
+              "type": "string"
+            },
+            "role": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "ref",
+            "role"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "tailTruncated": {
+        "description": "Present (true) when tail candidates exceeded the response cap.",
+        "type": "boolean"
+      },
+      "timeoutMs": {
+        "type": "number"
+      },
+      "waitedMs": {
+        "type": "number"
+      }
+    },
+    "required": [
+      "settled",
+      "waitedMs",
+      "captures",
+      "quietMs",
+      "timeoutMs"
+    ],
+    "type": "object"
+  },
+  "targetHittable": {
+    "type": "boolean"
+  },
+  "targetKind": {
+    "description": "Resolved interaction target kind.",
+    "enum": [
+      "point",
+      "ref",
+      "selector"
+    ],
+    "type": "string"
+  },
+  "warning": {
+    "type": "string"
+  },
+  "x": {
+    "description": "Resolved interaction x coordinate when available.",
+    "type": "number"
+  },
+  "y": {
+    "description": "Resolved interaction y coordinate when available.",
+    "type": "number"
+  }
+}

addedOutput schema / required
```
Added value: +[
+  "targetKind"
+]
```

Changed5 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"
+}

addedInput schema / properties / verify

Added value: +{
+  "description": "Capture cheap post-action evidence (AX digest, node counts, changedFromBefore) instead of a follow-up snapshot.",
+  "type": "boolean"
+}

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "oneOf": [
+    {
+      "properties": {
+        "backendResult": {
+          "additionalProperties": true,
+          "description": "Raw backend result passthrough.",
+          "type": "object"
+        },
+        "evidence": {
+          "properties": {
+            "changedFromBefore": {
+              "description": "Whether the post-action digest differs from the pre-action capture digest. false is evidence, not failure.",
+              "type": "boolean"
+            },
+            "digest": {
+              "description": "Order-independent digest of the post-action node multiset.",
+              "type": "string"
+            },
+            "foregroundApp": {
+              "description": "Foreground app bundle id or name, when the capture carries it.",
+              "type": "string"
+            },
+            "interactiveNodeCount": {
+              "description": "Subset of nodeCount the platform reports as hittable.",
+              "type": "number"
+            },
+            "nodeCount": {
+              "description": "Node count in the post-action interactive-only capture.",
+              "type": "number"
+            }
+          },
+          "required": [
+            "nodeCount",
+            "interactiveNodeCount",
+            "digest",
+            "changedFromBefore"
+          ],
+          "type": "object"
+        },
+        "kind": {
+          "const": "point",
+          "type": "string"
+        },
+        "message": {
+          "type": "string"
+        },
+        "point": {
+          "properties": {
+            "x": {
+              "type": "number"
+            },
+            "y": {
+              "type": "number"
+            }
+          },
+          "required": [
+            "x",
+            "y"
+          ],
+          "type": "object"
+        },
+        "warning": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "kind",
+        "point"
+      ],
+      "type": "object"
+    },
+    {
+      "properties": {
+        "backendResult": {
+          "additionalProperties": true,
+          "description": "Raw backend result passthrough.",
+          "type": "object"
+        },
+        "evidence": {
+          "properties": {
+            "changedFromBefore": {
+              "description": "Whether the post-action digest differs from the pre-action capture digest. false is evidence, not failure.",
+              "type": "boolean"
+            },
+            "digest": {
+              "description": "Order-independent digest of the post-action node multiset.",
+              "type": "string"
+            },
+            "foregroundApp": {
+              "description": "Foreground app bundle id or name, when the capture carries it.",
+              "type": "string"
+            },
+            "interactiveNodeCount": {
+              "description": "Subset of nodeCount the platform reports as hittable.",
+              "type": "number"
+            },
+            "nodeCount": {
+              "description": "Node count in the post-action interactive-only capture.",
+              "type": "number"
+            }
+          },
+          "required": [
+            "nodeCount",
+            "interactiveNodeCount",
+            "digest",
+            "changedFromBefore"
+          ],
+          "type": "object"
+        },
+        "hint": {
+          "type": "string"
+        },
+        "kind": {
+          "const": "ref",
+          "type": "string"
+        },
+        "message": {
+          "type": "string"
+        },
+        "node": {
+          "description": "Resolved snapshot node for the matched element.",
+          "properties": {
+            "appName": {
+              "type": "string"
+            },
+            "bundleId": {
+              "type": "string"
+            },
+            "depth": {
+              "type": "number"
+            },
+            "enabled": {
+              "type": "boolean"
+            },
+            "focused": {
+              "type": "boolean"
+            },
+            "hiddenContentAbove": {
+              "type": "boolean"
+            },
+            "hiddenContentBelow": {
+              "type": "boolean"
+            },
+            "hittable": {
+              "type": "boolean"
+            },
+            "identifier": {
+              "type": "string"
+            },
+            "index": {
+              "type": "number"
+            },
+            "interactionBlocked": {
+              "enum": [
+                "covered"
+              ],
+              "type": "string"
+            },
+            "label": {
+              "type": "string"
+            },
+            "parentIndex": {
+              "type": "number"
+            },
+            "pid": {
+              "type": "number"
+            },
+            "presentationHints": {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            "rect": {
+              "properties": {
+                "height": {
+                  "type": "number"
+                },
+                "width": {
+                  "type": "number"
+                },
+                "x": {
+                  "type": "number"
+                },
+                "y": {
+                  "type": "number"
+                }
+              },
+              "required": [
+                "x",
+                "y",
+                "width",
+                "height"
+              ],
+              "type": "object"
+            },
+            "ref": {
+              "description": "Stable snapshot ref such as e12.",
+              "type": "string"
+            },
+            "role": {
+              "type": "string"
+            },
+            "selected": {
+              "type": "boolean"
+            },
+            "subrole": {
+              "type": "string"
+            },
+            "surface": {
+              "type": "string"
+            },
+            "type": {
+              "type": "string"
+            },
+            "value": {
+              "type": "string"
+            },
+            "visibleToUser": {
+              "type": "boolean"
+            },
+            "windowTitle": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "index",
+            "ref"
+          ],
+          "type": "object"
+        },
+        "point": {
+          "properties": {
+            "x": {
+              "type": "number"
+            },
+            "y": {
+              "type": "number"
+            }
+          },
+          "required": [
+            "x",
+            "y"
+          ],
+          "type": "object"
+        },
+        "refLabel": {
+          "type": "string"
+        },
+        "selectorChain": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "target": {
+          "properties": {
+            "kind": {
+              "const": "ref",
+              "type": "string"
+            },
+            "ref": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "kind",
+            "ref"
+          ],
+          "type": "object"
+        },
+        "targetHittable": {
+          "type": "boolean"
+        },
+        "warning": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "kind",
+        "target"
+      ],
+      "type": "object"
+    },
+    {
+      "properties": {
+        "backendResult": {
+          "additionalProperties": true,
+          "description": "Raw backend result passthrough.",
+          "type": "object"
+        },
+        "evidence": {
+          "properties": {
+            "changedFromBefore": {
+              "description": "Whether the post-action digest differs from the pre-action capture digest. false is evidence, not failure.",
+              "type": "boolean"
+            },
+            "digest": {
+              "description": "Order-independent digest of the post-action node multiset.",
+              "type": "string"
+            },
+            "foregroundApp": {
+              "description": "Foreground app bundle id or name, when the capture carries it.",
+              "type": "string"
+            },
+            "interactiveNodeCount": {
+              "description": "Subset of nodeCount the platform reports as hittable.",
+              "type": "number"
+            },
+            "nodeCount": {
+              "description": "Node count in the post-action interactive-only capture.",
+              "type": "number"
+            }
+          },
+          "required": [
+            "nodeCount",
+            "interactiveNodeCount",
+            "digest",
+            "changedFromBefore"
+          ],
+          "type": "object"
+        },
+        "hint": {
+          "type": "string"
+        },
+        "kind": {
+          "const": "selector",
+          "type": "string"
+        },
+        "message": {
+          "type": "string"
+        },
+        "node": {
+          "description": "Resolved snapshot node for the matched element.",
+          "properties": {
+            "appName": {
+              "type": "string"
+            },
+            "bundleId": {
+              "type": "string"
+            },
+            "depth": {
+              "type": "number"
+            },
+            "enabled": {
+              "type": "boolean"
+            },
+            "focused": {
+              "type": "boolean"
+            },
+            "hiddenContentAbove": {
+              "type": "boolean"
+            },
+            "hiddenContentBelow": {
+              "type": "boolean"
+            },
+            "hittable": {
+              "type": "boolean"
+            },
+            "identifier": {
+              "type": "string"
+            },
+            "index": {
+              "type": "number"
+            },
+            "interactionBlocked": {
+              "enum": [
+                "covered"
+              ],
+              "type": "string"
+            },
+            "label": {
+              "type": "string"
+            },
+            "parentIndex": {
+              "type": "number"
+            },
+            "pid": {
+              "type": "number"
+            },
+            "presentationHints": {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            "rect": {
+              "properties": {
+                "height": {
+                  "type": "number"
+                },
+                "width": {
+                  "type": "number"
+                },
+                "x": {
+                  "type": "number"
+                },
+                "y": {
+                  "type": "number"
+                }
+              },
+              "required": [
+                "x",
+                "y",
+                "width",
+                "height"
+              ],
+              "type": "object"
+            },
+            "ref": {
+              "description": "Stable snapshot ref such as e12.",
+              "type": "string"
+            },
+            "role": {
+              "type": "string"
+            },
+            "selected": {
+              "type": "boolean"
+            },
+            "subrole": {
+              "type": "string"
+            },
+            "surface": {
+              "type": "string"
+            },
+            "type": {
+              "type": "string"
+            },
+            "value": {
+              "type": "string"
+            },
+            "visibleToUser": {
+              "type": "boolean"
+            },
+            "windowTitle": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "index",
+            "ref"
+          ],
+          "type": "object"
+        },
+        "point": {
+          "properties": {
+            "x": {
+              "type": "number"
+            },
+            "y": {
+              "type": "number"
+            }
+          },
+          "required": [
+            "x",
+            "y"
+          ],
+          "type": "object"
+        },
+        "refLabel": {
+          "type": "string"
+        },
+        "selectorChain": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "target": {
+          "properties": {
+            "kind": {
+              "const": "selector",
+              "type": "string"
+            },
+            "selector": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "kind",
+            "selector"
+          ],
+          "type": "object"
+        },
+        "targetHittable": {
+          "type": "boolean"
+        },
+        "warning": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "kind",
+        "point",
+        "target",
+        "node",
+        "selectorChain"
+      ],
+      "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

A4.6/5.0

Behavior5/5

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

With no annotations, the description carries the full burden and does so: it discloses that success means dispatch rather than landing, the motion re-check before dispatch and the target_still_moving refusal mode, the 90s timeout, and that a caller-supplied budget extends it. These are non-obvious failure and timing semantics an agent could not get from the schema.

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?

Front-loaded with the action and the sibling alternative, then the success-semantics caveat, then the motion edge case, then the timeout. Five sentences, none of which is filler; even the long motion sentence carries behavior found nowhere else.

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

Completeness4/5

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

For a 28-parameter, no-annotation tool the description covers the critical risks: dispatch-vs-effect ambiguity, the still-moving refusal, and timeout behavior, and the output schema makes return-value detail unnecessary. What remains unaddressed is the press-versus-click relationship and device-selection framing, though the latter is fully covered by schema descriptions.

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

Parameters4/5

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

Schema coverage is 100%, so the baseline is 3. The description adds meaning beyond the schema for key parameters: it enumerates the target variants the oneOf encodes and explains what settle/verify actually deliver (post-action confirmation) rather than just naming them. It does not explain count, intervalMs, jitterPx, or holdMs, but those are well-documented in the schema.

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

Purpose5/5

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

States a specific verb and resource ("Short-press a UI target") plus the three targeting modes (snapshot ref, selector, coordinates), so the agent knows exactly what action is performed and what input it consumes. It explicitly distinguishes itself from the longpress sibling in the next sentence.

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

Usage Guidelines4/5

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

Gives an explicit when-not with the alternative named: use longpress for context-menu or hold gestures. It also routes the agent to settle/verify/wait for result confirmation. The one gap is that the sibling 'click' is never differentiated, so an agent facing both still has to infer which to use.

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

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Schema Changelog

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