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wait_for_element

Pause browser automation until a specified element appears in the DOM, with an option to require it to be visible before continuing.

Instructions

Wait for an element to exist, with optional visibility requirement.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
visibleNo
selectorYes
timeoutMsNo
Behavior2/5

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

No annotations are provided, so the description bears full responsibility. It fails to disclose behavior on timeout, element not found, or visibility checks. The minimal statement 'wait for an element to exist' lacks concrete behavioral traits.

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?

The description is very concise (one sentence), but it sacrifices completeness for brevity. It could be more structured to include key details without being overly long.

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?

Given the tool's complexity (nested selector, multiple similar siblings, no output schema), the description is inadequate. It does not cover return values, error handling, or comparison to 'wait_until_visible'.

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

Parameters1/5

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

Schema description coverage is 0%, and the description adds no meaning to parameters. It does not explain 'selector', 'visible', or 'timeoutMs' beyond their schema definitions. The description should compensate but does not.

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

Purpose4/5

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

The description clearly states it waits for an element to exist with optional visibility. However, it does not differentiate from the sibling 'wait_until_visible', which likely targets visibility specifically. The verb+resource is clear, but sibling distinction is missing.

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 'wait_until_visible'. There is no mention of prerequisites, when-not, or exclusions. The context of existing comparable tools is ignored.

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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