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adb-logcat

Read-onlyIdempotent

Read Android device logs and return a summary with logId. Filter by package, tags, severity level, or time range.

Instructions

Read device logs. Returns summary with logId.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
linesYesDefault: 100
packageNo
tagsNo
levelNo
rawFilterNo
sinceNoe.g., '01-20 15:30:00.000'
Behavior2/5

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

Annotations already indicate readOnly and idempotent, so the description adds minimal value. It does not explain what 'summary' means or any behavioral traits beyond reading logs.

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

Conciseness3/5

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

The description is very short and efficient, but it sacrifices necessary detail. It is front-loaded but incomplete.

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

Completeness1/5

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

Given the 6 parameters and no output schema, the description is severely lacking. It does not explain how to filter logs, what the logId represents, or the return format.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The description adds no meaning to the 6 parameters, especially the 4 undocumented ones (package, tags, level, rawFilter). Schema coverage is only 33%, and the description fails to compensate.

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 clearly states the tool reads device logs, which is a specific verb+resource. However, it does not differentiate from siblings like adb-device or adb-shell, leaving ambiguity about the log source.

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. It lacks information about prerequisites, context, or when not to use it.

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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