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get_attribute

Retrieve the value of a specified attribute from a DOM element using a CSS selector. Useful for extracting href, class, value, or other element properties.

Instructions

Get an attribute value from a DOM element (e.g. href, value, class).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
selectorYes
attributeYes
session_idNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior2/5

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

No annotations are provided, so the description must disclose behavioral traits. It only states it 'gets' a value, implying a read operation, but fails to mention behavior on missing elements, error handling, or whether it waits for the element.

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

Conciseness5/5

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

The description is a single, front-loaded sentence with an example in parentheses. No fluff or redundant information.

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?

The description is minimal given the complexity of 3 parameters and no annotations. It lacks details on return value, error behavior, and the role of the optional session_id. Output schema exists but is not described.

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

Parameters3/5

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

Schema coverage is 0%, so the description must add meaning. It provides examples for the 'attribute' parameter but does not clarify 'selector' (CSS selector? XPath?) or 'session_id'. Partial compensation.

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?

The description clearly states it retrieves an attribute value from a DOM element and provides concrete examples (href, value, class), making its purpose specific and distinguishable from siblings like get_text.

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 is given on when to use this tool versus alternatives (e.g., get_dom, get_text). There is no mention of context, preconditions, or exclusions.

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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