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wavexis_eval

Read-onlyIdempotent

Evaluate JavaScript expressions in a browser environment and retrieve the result with its data type. Supports promise awaiting and navigation to URLs.

Instructions

Evaluate a JavaScript expression and return the result.

Args: input: Eval parameters (expression, await_promise).

Returns: JSON string with result and type.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
inputYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

Annotations indicate read-only, idempotent, non-destructive behavior. The description adds that it returns 'result' and 'type', and mentions awaiting promises, which provides some transparency beyond annotations. However, it does not disclose that the tool can navigate to URLs or manage sessions.

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 extremely concise, with a clear front-loaded purpose and a brief args/returns section. No unnecessary words.

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 (multiple parameters), the description is insufficient. It fails to explain how to use sessions, navigation, or backend options, making it hard for an agent to invoke correctly in many scenarios.

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 description coverage, the description only covers two parameters (expression, await_promise) out of seven, leaving many crucial parameters (url, session_id, etc.) unexplained. The description adds minimal value over the schema's own descriptions.

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 the tool evaluates JavaScript expressions and returns the result with type. This verb+resource pattern distinguishes it from sibling tools that perform other actions (clicks, fills, 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 is provided on when to use this tool versus alternative tools like wavexis_dom_get or wavexis_check. The description lacks context about its intended use case.

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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