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Robot Actions — Remote Device Control

by com.robotactions.test
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Device rotate

device_rotate

Two-finger rotation (twist) about (x,y) on an Android device — the gesture maps, photo editors and canvas apps listen for. Positive degrees turns clockwise on screen. The fingers follow the ARC of a circle rather than a straight line, which is what a rotation detector needs. Coordinates are PHYSICAL pixels.Pass input="hid" to require the virtual touchscreen: the gesture then reaches the app as real kernel input and fails loudly instead of silently falling back to injected input. That strict path used to be device_uhid_rotate, which stays callable under its old name.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
xYesRotation centre X
yYesRotation centre Y
udidYesDevice serial number (UDID)
inputNoInput path. 'auto' (default) prefers the virtual touchscreen and falls back to injected input. 'hid' requires the virtual touchscreen and fails if the device does not provide one — use it when the gesture must be real kernel input or must fail loudly.
degreesYesTurn in degrees; positive is clockwise on screen
durationNoGesture duration in ms (default: 400)

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedInput schema / properties / input / description
      Previous value: -"Input path. 'auto' (default) prefers the virtual touchscreen and falls back to injected input. 'hid' requires the virtual touchscreen and fails if the device does not provide one — use it when the gesture must be real kernel input or must fail loudly."New value: +"Input path. 'auto' (default) prefers the virtual touchscreen and falls back to injected input. 'hid' requires the virtual touchscreen and fails if the device does not provide one — use it when the gesture must be real kernel input or must fail loudly."
  2. Changed1 schema field changed
    • changedInput schema / properties / input / description
      Previous value: -"Input path. 'auto' (default) prefers the virtual touchscreen and falls back to injected input. 'hid' requires the virtual touchscreen and fails if the device does not provide one — use it when the gesture must be real kernel input or must fail loudly."New value: +"Input path. 'auto' (default) prefers the virtual touchscreen and falls back to injected input. 'hid' requires the virtual touchscreen and fails if the device does not provide one — use it when the gesture must be real kernel input or must fail loudly."
  3. Changed1 schema field changed
    • addedInput schema / properties / input
      Added value: +{
+  "description": "Input path. 'auto' (default) prefers the virtual touchscreen and falls back to injected input. 'hid' requires the virtual touchscreen and fails if the device does not provide one — use it when the gesture must be real kernel input or must fail loudly.",
+  "enum": [
+    "auto",
+    "hid"
+  ],
+  "type": "string"
+}
  4. Added

TDQS

A4.6/5.0
Behavior5/5

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

Annotations already declare non-read-only, non-destructive, non-idempotent, closed-world; the description adds meaningful behavior: physical-pixel coordinates, clockwise direction, arc-following finger path, and the strict hid path that reaches the app as real kernel input instead of silently falling back. It also notes the legacy alias device_uhid_rotate, which helps routing.

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

Conciseness4/5

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

The purpose is front-loaded and most sentences carry unique information. It is slightly long for a single gesture, and 'which is what a rotation detector needs' plus the legacy-name sentence are borderline extras, but there is no serious waste.

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?

For a six-parameter gesture tool with no output schema and full annotation coverage, the description supplies the missing operational context: coordinate units, direction, input-path behavior, and alias. Nothing critical for calling it correctly appears to be missing.

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 schema already documents all six parameters including the input enum and duration default. The description adds one useful semantic beyond the schema: coordinates are PHYSICAL pixels, while the clockwise-degrees note duplicates 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 gesture ('Two-finger rotation (twist) about (x,y)') on Android and distinguishes it from straight-line siblings by noting the fingers follow an arc rather than a straight line. An agent can identify the operation 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 Guidelines4/5

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

Gives clear context — maps, photo editors and canvas apps listen for this gesture — and explains when to pass input='hid' (real kernel input, fail loudly). It does not explicitly name alternatives like device_pinch or device_two_finger_swipe, so no exclusions are stated.

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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