{
  "schema_version": "1",
  "scenario_id": "news_source_discovery_v1",
  "name": "News Source Discovery V1",
  "description": "Find earliest news source using sequential MCP tools.",
  "input_schema": {
    "type": "object",
    "required": [
      "url"
    ],
    "properties": {
      "url": {
        "type": "string",
        "description": "URL of source news article"
      }
    }
  },
  "steps": [
    {
      "name": "search_news_sources",
      "type": "tool",
      "tool": "search_news_sources",
      "input": {
        "url": {
          "from": "input.url"
        }
      },
      "required_input_fields": [
        "url"
      ]
    },
    {
      "name": "parse_articles_batch",
      "type": "tool",
      "tool": "parse_article",
      "foreach": {
        "from": "steps.search_news_sources.payload.items",
        "as": "item"
      },
      "input": {
        "url": {
          "from": "item.url"
        }
      },
      "collect": {
        "url": {
          "from": "tool.payload.url"
        },
        "title": {
          "from": "tool.payload.title"
        },
        "text": {
          "from": "tool.payload.text"
        }
      },
      "collect_key": "items"
    },
    {
      "name": "extract_publication_date_batch",
      "type": "tool",
      "tool": "extract_publication_date",
      "foreach": {
        "from": "steps.parse_articles_batch.payload.items",
        "as": "item"
      },
      "input": {
        "article_text": {
          "from": "item.text"
        }
      },
      "collect": {
        "url": {
          "from": "item.url"
        },
        "title": {
          "from": "item.title"
        },
        "published_at": {
          "from": "tool.payload.published_at"
        }
      },
      "collect_key": "items"
    },
    {
      "name": "rank_sources_by_date",
      "type": "tool",
      "tool": "rank_sources_by_date",
      "input": {
        "items": {
          "from": "steps.extract_publication_date_batch.payload.items"
        }
      }
    },
    {
      "name": "generate_summary",
      "type": "tool",
      "tool": "generate_summary",
      "input": {
        "items": {
          "from": "steps.rank_sources_by_date.payload.ranked_items"
        }
      }
    }
  ]
}