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cuber-it

mcp-playwright-tools

by cuber-it

get_attribute

Retrieve the value of a specified attribute from a web element using its CSS selector. Helps extract data like href, src, or data attributes for automation.

Instructions

Get an attribute value from an element

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
selectorYes
attributeYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations provided; description does not disclose behavioral traits such as behavior if attribute is missing, return format, or whether it works on all element types. Minimal info beyond the action itself.

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

Conciseness3/5

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

Description is very concise (one sentence) but lacks necessary details. While no fluff, it is under-specified for a tool with no annotations and no parameter descriptions.

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

Completeness2/5

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

Despite output schema existence, description does not cover error conditions, return values, or differentiate from similar tools. Incomplete for effective use without additional context.

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

Parameters2/5

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

With 0% schema coverage, description does not clarify the format of 'selector' (CSS, XPath?) or the expected format of 'attribute'. The parameter names are self-explanatory but not elaborated.

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

Purpose5/5

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

Description clearly states verb 'get' and resource 'attribute value from an element', which is distinct from sibling tools like get_text, get_html, etc.

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

Usage Guidelines2/5

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

No guidance on when to use this tool versus alternatives like get_text or when not to use it. Sibling tools include many 'get' operations but no differentiation is provided.

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

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