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devices

List available devices on specified platforms (iOS, Android, macOS, Linux, Apple) with optional filters for target type, device name, UDID, or serial.

Instructions

List available devices.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sessionNoAgent-device session name.
platformNoPlatform selector used to resolve a device.
deviceTargetNoDevice target form. Maps to the CLI --target flag.
targetNoAlias for deviceTarget on commands without a UI target field. Interaction commands reserve target for the UI element.
deviceNoDevice name selector.
udidNoiOS device UDID selector.
serialNoAndroid serial selector.
iosSimulatorDeviceSetNoiOS simulator device-set path used for device resolution.
androidDeviceAllowlistNoAndroid serial allowlist used for device resolution.
daemonBaseUrlNoRemote daemon base URL.
daemonAuthTokenNoRemote daemon auth token.
tenantNoRemote tenant identifier.
runIdNoLease run identifier.
leaseIdNoExisting lease identifier.
cwdNoWorking directory for command execution.
debugNoEnable debug diagnostics.
stateDirNoAgent-device state directory.
Behavior2/5

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

No annotations exist, so the description must carry the full burden. It does not disclose that the tool is read-only, whether it returns all devices or requires parameters, or any side effects. Minimal transparency.

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?

The description is one sentence with no filler. It is appropriately sized for a simple list tool.

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?

Given the tool's simplicity (list devices) and the schema covering all 17 parameters, the description is minimally complete. However, it lacks any information about the output format or behavior (e.g., filtering, pagination), which could be helpful.

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%, and each parameter has a description. The tool description adds no additional meaning beyond the schema. Baseline 3 is appropriate.

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?

The description 'List available devices' clearly specifies the verb (list) and resource (devices). It distinguishes itself from sibling tools like 'alert', 'apps', 'boot', etc., which are actions, not listing operations.

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

Usage Guidelines3/5

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

No explicit guidance on when to use this tool versus alternatives. While it's a simple list, the many filter parameters could benefit from usage context, but no 'when not to use' or alternatives are mentioned.

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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