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html_to_screenshot

Renders raw HTML string as a screenshot image using a headless browser, returning a hosted URL or base64 encoded image data.

Instructions

Convert HTML content to a screenshot image using ReviewWeb.site API. Renders raw HTML string via headless browser and returns screenshot as hosted URL or image data.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
htmlYesRaw HTML string to render as a screenshot
viewport_widthNoViewport width in pixels (100-3840)
viewport_heightNoViewport height in pixels (100-2160)
full_pageNoCapture full page instead of just viewport
outputNo"url" returns hosted image URL, "buffer" returns base64 image dataurl
typeNoScreenshot image formatpng
qualityNoJPEG quality 1-100 (only used when type is jpeg)
delay_after_loadNoMilliseconds to wait after page load before taking screenshot
api_keyNoYour ReviewWebsite API key
Behavior2/5

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

No annotations provided, and the description only mentions 'renders via headless browser' and 'returns hosted URL or image data'. It does not disclose potential side effects, authentication needs (api_key is a parameter but not described as required for access), rate limits, or error handling behavior.

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?

Two sentences, front-loaded with the core purpose. No redundant words; every sentence adds value. Highly concise and structured.

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

Completeness3/5

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

With 9 parameters and no output schema, the description should provide more context on tool behavior. It adequately states the core functionality but lacks details on result format, error states, or API authorization, making it moderately complete.

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 description coverage is 100%, so baseline is 3. The description adds minimal extra meaning beyond the schema (only mentions 'raw HTML string' and output options). No parameter details are elaborated beyond what the schema already provides.

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 verb 'Convert' and the resource 'HTML content to a screenshot image', and distinguishes from sibling tools (e.g., scrape_url for live URLs) by specifying raw HTML rendering via headless browser.

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 explicit guidance on when to use this tool versus alternatives (e.g., scrape_url, summarize_url). No prerequisites or exclusions mentioned, leaving the agent without decision support.

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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