take_screenshot

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

No annotations are provided, so the description carries the full burden. It mentions 'save it locally', indicating file creation, but does not mention potential side effects like overwriting existing files or file format details beyond the default extension.

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 unnecessary words. It directly states the action and outcome without redundancy.

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 action, the description is adequate. It specifies the output (screenshot saved locally) but could benefit from mentioning that it captures the visible viewport or current screen area, which is implied but not explicit.

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 only parameter 'filename' is self-explanatory, and its default value 'screenshot.png' clarifies the expected format. The description does not explicitly explain it, but the meaning is obvious and low-risk.

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 verb 'Take' and resource 'screenshot' clearly define the action, and it is distinct from the sibling tools (navigate, click, fill, get_content, evaluate_js). No ambiguity about what this tool does.

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 capturing the current visual state, but it does not explicitly state when to use it versus alternatives. However, given its unique purpose, the lack of explicit guidance is acceptable.

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