analyze_mobile_app_screenshot

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

No annotations are provided, so the description must bear the burden of behavioral disclosure. It states the tool provides insights but does not disclose any behavioral traits such as whether it modifies anything, required permissions, rate limits, or that it is a read-only analysis. This is insufficient for an agent to understand side effects.

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 description is two sentences long and front-loaded with the purpose. It is concise with no redundant words. However, it could be slightly more structured by listing the focus areas explicitly.

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?

Given the tool has 8 parameters and no output schema or annotations, the description is incomplete. It does not explain the return format (default json), behavior of the platform auto-detect, or how focus areas affect the analysis. An agent would need more context to use it confidently.

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?

All 8 parameters have descriptions in the schema (100% coverage), so the description does not need to add much. It mentions 'insights into UI design, user experience, etc.' which aligns with the platform and focusArea parameters but does not add significant new meaning beyond the schema.

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 clearly states it is a specialized tool for analyzing mobile app screenshots, providing insights into UI design, UX, platform conventions, and functionality. This distinguishes it from sibling tools analyze_image and analyze_webpage_screenshot, which are for general images and webpages respectively.

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?

The description implies usage for mobile app screenshots via 'specialized' and the listed insights, and the sibling tools provide context for when not to use (generic images, webpages). However, it does not explicitly state when to avoid this tool or provide alternatives.

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