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react-native

Run mobile app automation helpers to dismiss development error overlays and continue UI testing. Operations time out after 90 seconds.

Instructions

Run supported React Native automation helpers. Use dismiss-overlay to close a visible development error overlay before continuing normal UI automation. Times out after 90s.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
udidNoApple device or simulator UDID; the selector that pins one device when several share a name.
debugNoEnable debug diagnostics.
runIdNoLease run identifier.
actionYes
deviceNoDevice name selector (a UDID belongs in udid, a serial in serial).
serialNoAndroid, HarmonyOS, or Vega VVD serial selector.
targetNoAlias for deviceTarget on commands without a UI target field. Interaction commands reserve target for the UI element.
tenantNoRemote tenant identifier.
leaseIdNoExisting lease identifier.
sessionNoAgent-device session name.
noRecordNoDo not record this action.
platformNoPlatform selector used to resolve a device.
includeCostNoInclude per-command agent-cost (cost.wallClockMs, …) in structuredContent. Defaults to off; the default response shape is unchanged.
deviceTargetNoDevice target form. Maps to the CLI --target flag.
responseLevelNoResponse verbosity: token-cheap digest / default (today) / full. Defaults to default; the default response shape is unchanged.
mcpOutputFormatNoMCP text content format. Defaults to optimized agent-friendly text; use json for JSON text. Structured content is always returned separately.
androidDeviceAllowlistNoAndroid serial allowlist used for device resolution.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed3 schema fields changedv0.21.0
    • 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."
  2. Changed8 schema fields changedv0.20.10
    • 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"
      -}
  3. Changed1 schema field changedv0.20.9
    • changedInput schema / properties / platform / enum
      Previous value: -[
      -  "apple",
      -  "android",
      -  "vega",
      -  "linux",
      -  "web",
      -  "ios",
      -  "macos"
      -]New value: +[
      +  "apple",
      +  "android",
      +  "harmonyos",
      +  "vega",
      +  "linux",
      +  "web",
      +  "ios",
      +  "macos"
      +]
  4. Changed3 schema fields changedv0.20.2
    • 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."
  5. Changed3 schema fields changedv0.17.11
    • 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"
      +}
  6. Changed1 schema field changedv0.17.7
    • changedInput schema / properties / platform / enum
      Previous value: -[
      -  "ios",
      -  "macos",
      -  "android",
      -  "linux",
      -  "apple"
      -]New value: +[
      +  "ios",
      +  "macos",
      +  "android",
      +  "linux",
      +  "web",
      +  "apple"
      +]
  7. Changed5 schema fields changedv0.17.6
    • 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"
      +]
  8. First observedv0.16.9

TDQS

A3.6/5.0
Behavior3/5

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It adds a useful 90-second timeout and states the dismissal action, but it does not disclose side effects, prerequisites, or failure behavior. This is adequate but not rich.

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 description is short and front-loaded with the intended action and use case. The opening phrase 'Run supported React Native automation helpers' is somewhat generic, but the following sentence earns its place by giving concrete guidance.

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

Completeness3/5

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

For a single-action helper with no output schema and no annotations, the description covers when to use it and the timeout. It does not explain what response to expect or whether the action has side effects on app state, leaving some gaps for the agent.

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 94%, so the schema already documents almost all parameters. The description clarifies the one meaningful parameter ('dismiss-overlay') beyond the raw enum list, but it adds no further parameter-level detail.

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

Purpose4/5

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

The description names a concrete action ('dismiss-overlay'), its target ('development error overlay'), and a clear purpose ('before continuing normal UI automation'). It does not simply restate the tool name, and it distinguishes this React Native-specific helper from the generic sibling automation commands.

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?

The description explicitly tells the agent when to use the tool: when a visible development error overlay needs to be dismissed before continuing UI automation. It does not enumerate exclusions or direct the agent to an alternative, but the context is clear enough for the single supported action.

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