Capturar URL

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

No annotations are present, so the description carries the full burden. It mentions opening a URL and saving a screenshot but fails to disclose behaviors such as page load waiting, network dependencies, file system writes, error handling, or how the output is returned. This is a minimal behavioral disclosure.

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 succinct sentence that is front-loaded with the core action. It avoids fluff, but it is so brief that it sacrifices informative content. Still, it is appropriately structured for quick parsing.

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?

With 7 parameters, no output schema, and no annotations, a one-sentence description is grossly insufficient. It provides no information about return values, side effects, failure modes, or parameter interactions, making it nearly impossible for an agent to invoke correctly beyond the simplest cases.

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?

Schema description coverage is only 14%, with only 'selector' having a description. The tool description only adds 'viewport configurable', which covers the width and height parameters indirectly. waitMs, fullPage, selector, and outputPath semantics are not explained in either the schema or the description, leaving major gaps.

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 opens a URL and saves a PNG screenshot with a configurable viewport, which is a specific verb+resource+output. However, it does not explicitly differentiate it from the sibling tool 'capture_with_login', relying on the name to imply the difference.

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 guidance is provided about when to use this tool versus 'capture_with_login' or any other alternatives. The description does not mention the absence of login handling or any prerequisites, so an agent has no basis for selecting it over the sibling.

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