name: fetch_document
description: "Retrieve and extract the full text content of a URL or document"
when_to_use: "When a specific document, article, paper, or page needs to be read in full for analysis; when the snippet from a search result is insufficient and the complete source text is required"
parameters:
  url:
    type: string
    description: "The URL of the document, article, or page to retrieve"
    required: true
  extract_sections:
    type: array
    description: "Specific sections to extract from the document (e.g. ['abstract', 'conclusions', 'methodology']); if omitted, full content is returned"
    required: false
returns:
  type: object
  description: "Full text content of the document with metadata"
  properties:
    url:
      type: string
    title:
      type: string
    content:
      type: string
    word_count:
      type: integer
    extracted_at:
      type: string