Retrieves content from a URL and returns it in a clean, readable format.

<instruction>
- Extract information from web pages, GitHub issues/PRs, Stack Overflow, Wikipedia, Reddit, NPM, arXiv, technical blogs, RSS/Atom feeds, JSON endpoints
- Read PDF or DOCX files hosted at a URL
- Use `raw: true` for untouched HTML or debugging
</instruction>

<output>
Returns processed, readable content. HTML transformed to remove boilerplate. PDF/DOCX converted to text. JSON returned formatted. With `raw: true`, returns untransformed HTML.
</output>