Robot Actions — Remote Device Control

iOS two finger swipe

ios_two_finger_swipe

Two-finger swipe from (x1,y1) to (x2,y2) on an iOS device — a two-finger scroll/pan. Both fingers travel the vector in parallel, offset perpendicular to it so one never runs through the other. Use where a one-finger swipe does the wrong thing: tilting a map into 3D, scrolling inside a web view that pans with one finger, or dismissing a two-finger-aware sheet. Coordinates are screen points. Works without an automation session when the direct input path is available; falls back to one otherwise (see input).

Input Schema

TableJSON Schema

Name	Required	Description
`x1`	Yes	Start X (screen points)
`x2`	Yes	End X (screen points)
`y1`	Yes	Start Y (screen points)
`y2`	Yes	End Y (screen points)
`norm`	No	If true, x/y (and path points) are 0..1 FRACTIONS of the screen — pass `pixelInScreenshot ÷ screenshotSize` directly (scale-free, matches the frontend, avoids point-guessing). Default false = iOS screen points.
`udid`	Yes	iOS device UDID
`input`	No	Input path. 'auto' (default) tries the direct input path first — the one that needs no automation session — and falls back to the session only when the direct path is not usable right now (the response says which one ran). On a device set to direct-input-only, an unusable direct path is reported as an error instead of silently switching to the session. 'hid' forces the direct path with no fallback, reporting 'no HID available' on iOS 17.x or with no tunnel. 'session' forces the automation session even when the direct path would have worked.
`durationMs`	No	Gesture duration in ms (default: 400)

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedSep 28, 2026

changedInput schema / properties / input / description

Previous value: -"Input path. 'auto' (default) tries the direct input path first — the one that needs no automation session — and falls back to the session only when the direct path is not usable right now (the response says which one ran). 'hid' forces the direct path with no fallback, reporting 'no HID available' on iOS 17.x or with no tunnel. 'session' forces the automation session even when the direct path would have worked."New value: +"Input path. 'auto' (default) tries the direct input path first — the one that needs no automation session — and falls back to the session only when the direct path is not usable right now (the response says which one ran). On a device set to direct-input-only, an unusable direct path is reported as an error instead of silently switching to the session. 'hid' forces the direct path with no fallback, reporting 'no HID available' on iOS 17.x or with no tunnel. 'session' forces the automation session even when the direct path would have worked."

Changed2 schema fields changedSep 26, 2026

changedInput schema / properties / input / description

Previous value: -"Input path. 'auto' (default) drives the gesture through the automation session. 'hid' drives it through the direct input path instead, which needs no automation session — it reports 'no HID available' on iOS 17.x or with no tunnel."New value: +"Input path. 'auto' (default) tries the direct input path first — the one that needs no automation session — and falls back to the session only when the direct path is not usable right now (the response says which one ran). 'hid' forces the direct path with no fallback, reporting 'no HID available' on iOS 17.x or with no tunnel. 'session' forces the automation session even when the direct path would have worked."

changedInput schema / properties / input / enum

Previous value: -[
-  "auto",
-  "hid"
-]New value: +[
+  "auto",
+  "hid",
+  "session"
+]

Changed2 schema fields changedSep 17, 2026

addedInput schema / properties / input

Added value: +{
+  "description": "Input path. 'auto' (default) drives the gesture through the automation session. 'hid' drives it through the direct input path instead, which needs no automation session — it reports 'no HID available' on iOS 17.x or with no tunnel.",
+  "enum": [
+    "auto",
+    "hid"
+  ],
+  "type": "string"
+}

addedInput schema / properties / norm

Added value: +{
+  "description": "If true, x/y (and path points) are 0..1 FRACTIONS of the screen — pass `pixelInScreenshot ÷ screenshotSize` directly (scale-free, matches the frontend, avoids point-guessing). Default false = iOS screen points.",
+  "type": "boolean"
+}

AddedSep 16, 2026

TDQS

A4.7/5.0

Behavior5/5

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

Annotations cover the safety profile (not read-only, not destructive), but the description adds meaningful behavior: exact gesture mechanics, screen-point coordinates, and the session/no-session execution model including fallback to an automation session and what happens on direct-input-only devices. That is substantial context beyond the annotations.

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 coordinate semantics, then usage scenarios, then the execution-path caveat. Every sentence carries distinct information with no redundancy.

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

Completeness5/5

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

No output schema exists, but the description fully covers gesture mechanics, coordinate units, when to choose it, and the input-path/fallback behavior for this complex gesture tool. Nothing essential for correct invocation is missing.

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?

Schema description coverage is 100%, so the schema already documents all eight parameters, and the description adds only marginal meaning (screen points, the `input` fallback referenced by name). Baseline 3 is appropriate since the schema does the heavy lifting.

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+resource (two-finger swipe on an iOS device) and defines the motion precisely (a two-finger scroll/pan with fingers offset perpendicular to the vector). An agent can distinguish it from ios_swipe and ios_two_finger_tap without opening the schema.

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

Usage Guidelines5/5

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

Explicitly names when to use it ('where a one-finger swipe does the wrong thing') and enumerates three concrete scenarios: tilting a map into 3D, scrolling a web view that pans with one finger, dismissing a two-finger-aware sheet. This is explicit when-to-use guidance against the one-finger alternative.

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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