Navigates to the specified URL, renders the page, and extracts structured data
such as product details, article content, or general page information.

Use this when:
- You need to extract structured data from a web page
- You want product details, article content, or general page data
- You need LLM-enhanced semantic normalization of extracted content

Returns:
    By default, the extracted structured content inline. With mode="async", a JSON envelope with a `task_id` — poll `webextrator_get_task` until it reports `finished_at`, then read the extracted content from its `response`.

Uses a headless browser to navigate to the specified URL, waits for JavaScript
to execute, and returns the final rendered HTML source.

Use this when:
- You need the fully rendered HTML of a JavaScript-heavy page
- You want to inspect the DOM after dynamic content has loaded
- You need to capture single-page application (SPA) content

Returns:
    By default, the rendered HTML content inline. With mode="async", a JSON
    envelope with a `task_id` — poll `webextrator_get_task` until it reports
    `finished_at`, then read the rendered HTML from its `response`.

Provides detailed information on how to use the WebExtrator tools effectively,
including parameters, examples, and best practices for web extraction and rendering.

Returns:
    Complete usage guide for WebExtrator tools.

Use this when:
- You submitted an extract or render request and got back a task_id
- You want to poll for the result of a specific task by its ID

Returns:
    JSON response containing the task status and result data.

Use this when:
- You submitted multiple async requests and want to check their results together
- You want to paginate through a list of tasks

Returns:
    JSON response containing the list of task statuses and result data.