Data Dictionary

Generate a complete data dictionary for the following schema.

Table/Object name: {{table_name}}
Schema type: {{schema_type}}
Business domain: {{domain}}

Schema:
{{schema}}

Return ONLY valid JSON with this exact structure:
{
  "dictionary": {
    "tableName": "{{table_name}}",
    "description": "1-2 sentence description of the table/object",
    "fields": [
      {
        "name": "field_name",
        "type": "data type",
        "description": "clear description of what this field stores",
        "example": "realistic example value",
        "constraints": "e.g. NOT NULL, UNIQUE or required, max 255 chars or none",
        "isPii": true or false
      }
    ]
  }
}