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adb_cat

Read a text file from an Android device via ADB. Specify file path, optional device serial, and maximum lines to return.

Instructions

Read a text file from the device

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pathYesFile path on device
deviceNoDevice serial
maxLinesNoMaximum lines to return (1-10000)
Behavior2/5

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

No annotations are present, so the description must disclose behavioral traits. It only says 'Read a text file', omitting that the operation is read-only, non-destructive, or that it outputs to stdout. It also does not mention limitations such as binary file handling or performance implications.

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

Conciseness2/5

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

The description is extremely short (6 words), which leaves it under-specified. While brevity is valued, here it sacrifices necessary context, making it less helpful for an AI agent.

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

Completeness2/5

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

Given the lack of output schema and the tool's simplicity, the description should mention what is returned (e.g., file contents) or any constraints (e.g., maxLines behavior). It fails to provide this information, making it incomplete.

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?

The input schema has 100% description coverage for all three parameters. The description adds no additional meaning beyond what the schema already provides, so a baseline score of 3 is appropriate.

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 uses the verb 'Read' and specifies 'text file from the device', which clearly indicates the tool's purpose. However, it does not differentiate from sibling tools like adb_pull or adb_grep, which also read file contents.

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

Usage Guidelines2/5

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

No guidance is provided on when to use this tool versus alternatives. For example, it does not mention that adb_cat is for quick inspection while adb_pull is for copying files, or that adb_grep is for searching within files.

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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