Lists pre-configured reports (prebuilds) available for a connector.
**What is a prebuild?**
A prebuild is a standardized report maintained by Quanti for a given connector (e.g., Campaign Stats for Google Ads). It defines the BigQuery table structure (columns, types, metrics) and the associated API query.
**When to use this tool:**
- When the user asks "what reports are available for [connector]?"
- When the user doesn't know which data or metrics exist for a connector
- BEFORE get_schema_context, to explore available reports for a connector
- To understand the data structure before writing SQL
**Difference with get_schema_context:**
- list_prebuilds → discover which reports/tables EXIST for a connector (catalog)
- get_schema_context → get the actual BigQuery schema for the client project (effective data)
**Response format:**
Returns a JSON with for each prebuild: its ID, name, description, BigQuery table name, and the list of fields (name, type, description, is_metric). Fields marked is_metric=true are aggregatable metrics (impressions, clicks, cost...), others are dimensions (date, campaign_name...).
**SKU examples**: googleads, meta, tiktok, tiktok-organic, amazon-ads, amazon-dsp, piano, shopify-v2, microsoftads, prestashop-api, mailchimp, kwanko