agent-device

Official

by callstack

Overview Schema Source Related Servers Discussions Admin

TypeScript

Remote

find

Locate UI elements on a device by query, returning matching targets for interaction or inspection.

Instructions

Find by text/label/value/role/id and run action Times out after 90s.

Input Schema

TableJSON Schema

Name	Required	Description
`raw`	No
`last`	No
`udid`	No	Apple device or simulator UDID; the selector that pins one device when several share a name.
`debug`	No	Enable debug diagnostics.
`depth`	No
`first`	No
`query`	Yes
`runId`	No	Lease run identifier.
`value`	No
`action`	No
`device`	No	Device name selector (a UDID belongs in udid, a serial in serial).
`record`	No	Force-record this out-of-band observation into a repair-armed heal (mutually exclusive with noRecord). Authored replay steps are recorded automatically and never need this. On find, valid only for a read-only action.
`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.
`locator`	No
`session`	No	Agent-device session name.
`noRecord`	No	Do not record this action.
`platform`	No	Platform selector used to resolve a device.
`timeoutMs`	No
`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
`x`	No	Resolved x coordinate for mutating find actions.
`y`	No	Resolved y coordinate for mutating find actions.
`ref`	No	Snapshot ref without the @ prefix when the find action returns one.
`cost`	No
`node`	No	Snapshot node for find get_attrs/get_text.
`text`	No	Text value returned by find get_text.
`found`	No	Whether a wait/exists/read-only find satisfied its condition.
`query`	No	Query argument used for the find action.
`locator`	No	Locator kind used for the find action.
`matches`	No	Every match for the read-only find list action (#1625): { ref, node } each.
`message`	No	Diagnostic message for mutating find actions.
`waitedMs`	No	Milliseconds waited for a read-only find condition.
`refsGeneration`	No	ADR 0014 ref frame epoch for read-only find actions.

Schema Changelog

Changes observed during successful MCP inspections.

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."

Changed9 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"
-}

removedOutput schema / properties / settle

Removed value: -{
-  "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"
-}

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 changedv0.20.6Aug 7, 2026

changedInput schema / properties / action / enum

Previous value: -[
-  "click",
-  "focus",
-  "exists",
-  "getText",
-  "getAttrs",
-  "wait",
-  "fill",
-  "type"
-]New value: +[
+  "click",
+  "focus",
+  "exists",
+  "list",
+  "getText",
+  "getAttrs",
+  "wait",
+  "fill",
+  "type"
+]

addedOutput schema / properties / matches

Added value: +{
+  "description": "Every match for the read-only find list action (#1625): { ref, node } each.",
+  "items": {
+    "additionalProperties": true,
+    "description": "One listed match with its snapshot ref and node.",
+    "type": "object"
+  },
+  "type": "array"
+}

Changed5 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"
+]

addedInput schema / properties / record

Added value: +{
+  "description": "Force-record this out-of-band observation into a repair-armed heal (mutually exclusive with noRecord). Authored replay steps are recorded automatically and never need this. On find, valid only for a read-only action.",
+  "type": "boolean"
+}

changedInput schema / properties / serial / description

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

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "description": "Daemon response data for the find command.",
+  "properties": {
+    "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"
+    },
+    "found": {
+      "description": "Whether a wait/exists/read-only find satisfied its condition.",
+      "type": "boolean"
+    },
+    "locator": {
+      "description": "Locator kind used for the find action.",
+      "type": "string"
+    },
+    "message": {
+      "description": "Diagnostic message for mutating find actions.",
+      "type": "string"
+    },
+    "node": {
+      "additionalProperties": true,
+      "description": "Snapshot node for find get_attrs/get_text.",
+      "type": "object"
+    },
+    "query": {
+      "description": "Query argument used for the find action.",
+      "type": "string"
+    },
+    "ref": {
+      "description": "Snapshot ref without the @ prefix when the find action returns one.",
+      "type": "string"
+    },
+    "refsGeneration": {
+      "description": "ADR 0014 ref frame epoch for read-only find actions.",
+      "type": "number"
+    },
+    "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"
+    },
+    "text": {
+      "description": "Text value returned by find get_text.",
+      "type": "string"
+    },
+    "waitedMs": {
+      "description": "Milliseconds waited for a read-only find condition.",
+      "type": "number"
+    },
+    "x": {
+      "description": "Resolved x coordinate for mutating find actions.",
+      "type": "number"
+    },
+    "y": {
+      "description": "Resolved y coordinate for mutating find actions.",
+      "type": "number"
+    }
+  },
+  "type": "object"
+}

Changed3 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"
+}

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

C2.5/5.0

Behavior2/5

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

No annotations are present, so the description carries the full burden. It discloses a 90-second timeout, which is useful, but does not describe side effects (e.g., destructive actions), behavior when no element is found, or whether the action is read-only or mutating. This is a significant gap for a tool that can run click, fill, and type actions.

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

Conciseness3/5

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

The description is a single sentence, which is concise and front-loaded with the main purpose. However, it lacks any structure or breakdown of the action and locator options, and the timeout note is appended without context.

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

Completeness1/5

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

Given the tool's complexity (26 parameters, no annotations, output schema present but not described), the description is grossly inadequate. It does not explain the action list, locator semantics, device targeting, or any of the boolean flags. An agent would have to rely almost entirely on the schema, which itself is incomplete at 65% coverage. This is far from a minimum viable description for such a feature-rich tool.

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

Parameters2/5

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

Schema coverage is 65%, so many parameters are described in the schema. The description adds meaning for the locator concept (text/label/value/role/id), but does not explain the action enum, flags like raw/last/first, or device selection parameters. It adds only marginal value beyond the schema for a tool with 26 parameters.

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 states a clear purpose: find by text/label/value/role/id and run an action. This distinguishes it from siblings like click or get, which are single-purpose. It does not explicitly name an alternative, but the core action is unambiguous.

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?

No guidance is given on when to use this tool versus alternatives such as click, fill, or get. It does not mention prerequisites, exclusions, or scenarios where a simpler tool 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

find

Instructions

Input Schema

Output Schema

Schema Changelog

TDQS

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