analyze_mobile

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

No annotations are present, so the description carries the full burden of behavioral disclosure. It says only that the tool analyzes mobile viewport and responsive configuration, but does not state whether it is read-only, what checks it performs, whether it requires JavaScript rendering, or what side effects (if any) exist.

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

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

The single sentence is front-loaded, focused, and free of filler. However, it is arguably too terse for a tool whose siblings and behavioral profile are otherwise undocumented.

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

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

For a simple one-parameter analysis tool with no output schema and no annotations, the description should at least clarify scope, output, and relation to similar tools. It states only a high-level purpose and leaves sibling ambiguity, parameter semantics, and behavioral details unaddressed.

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

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

There is one required parameter, 'url', but schema description coverage is 0% and the description does not mention the parameter at all. It therefore adds no meaning beyond the bare schema type and format, failing to compensate for the missing schema documentation.

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

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

The description states a clear verb and resource: 'Analyze mobile viewport and responsive configuration.' It identifies what the tool does, but does not distinguish it from the sibling analyze_viewport, leaving ambiguity about which viewport-related analyzer to choose.

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

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

No when-to-use, when-not-to-use, or alternative guidance is provided. With many sibling analyzers including analyze_viewport, analyze_accessibility, and analyze_technical, the description gives no criteria for selecting this tool over others.

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