name: document_fetch
description: "Fetch and extract text content from a URL (PDF, web page, or document)"
when_to_use: "When a specific URL or document needs to be retrieved and read for research; when tracing a claim back to its primary source"
parameters:
  url:
    type: string
    description: "The URL of the document or web page to fetch"
    required: true
  extract_mode:
    type: string
    description: "How to extract content: 'full' for complete text, 'summary' for key sections"
    default: full
returns:
  type: object
  description: "Extracted document content with metadata"
  properties:
    content:
      type: string
    title:
      type: string
    url:
      type: string
    fetched_at:
      type: string