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adb_shell

Run shell commands on connected Android devices or emulators to manage files, control settings, and interact with system components.

Instructions

Executes a shell command on a connected Android device or emulator. Use this for running Android system commands, managing files and permissions, controlling device settings, or interacting with Android components. Supports all standard shell commands available on Android (ls, pm, am, settings, etc.). Specify a device ID to target a specific device when multiple devices are connected.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
commandYesShell command to execute on the device
deviceNoSpecific device ID (optional)
Behavior3/5

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

No annotations provided; description covers basic functionality but does not disclose potential risks like destructive commands or permission requirements. Adequate but not thorough for a powerful shell tool.

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?

Three succinct sentences, front-loaded with core purpose. No extraneous information; every sentence earns its place.

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?

Does not mention that the tool returns command output (stdout/stderr). With no output schema, this is a gap. Otherwise covers input and usage scenarios. Moderately complete.

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?

Adds value beyond schema by explaining 'command' accepts all standard shell commands and 'device' is optional for targeting specific devices. Schema coverage is 100%, but description enriches understanding.

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?

Clearly states the tool executes a shell command on Android devices, with specific verb 'executes' and resource 'shell command on Android device'. Distinguishes from siblings like adb_install or adb_logcat which are more specific.

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?

Provides clear context for when to use: running system commands, managing files, controlling settings. Mentions device targeting when multiple devices are connected. However, lacks explicit exclusions vs sibling tools.

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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