take_screenshot

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

With no annotations provided, the description must carry the burden of behavioral disclosure, but it only states the action. It does not disclose what happens with the screenshot (e.g., return path, base64, file saving), possible side effects, or any permission requirements.

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 a single concise sentence with no filler, and the key verb and object are front-loaded. It is not as bloated as typical descriptions, though it is under-specified in content.

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 existence of closely related sibling tools and the absence of an output schema or annotations, the description is too thin to fully contextualize the tool's behavior. It does not clarify return values, file types, or how it differs from capture_screen/get_screen_image.

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?

The single 'format' parameter is described in the schema with an enum and default, making its syntactic meaning clear. However, the description provides no semantic context (e.g., why choose png over jpg), and with 0% schema description coverage, the description fails to compensate for the lack of parameter explanation.

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 the tool's action ('Take a screenshot') and target ('from the device'), so the purpose is understandable. However, it does not distinguish this tool from similar siblings like capture_screen or get_screen_image, which prevents a higher score.

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?

There is no guidance on when to use this tool versus the alternative capture tools. No context is given about prerequisites, platform support, or situations where one sibling would be more appropriate.

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