**Warning**: The attribute must exist on the type visualized by the connected table!

**Important — Quoting Convention**:
- **Custom attributes** require single quotes around the attribute name inside the string value: `"'cf.cplace.myApp.myAttribute'"`
- **Builtin attributes** (e.g., `name`, `createdAt`) are specified without inner quotes: `"name"`
- Without inner quotes, the widget silently fails and shows "Please complete the widget configuration"
- **Inside a `layout.define` string**: wrap the config value in a **double-quoted** outer JS string so these single-quoted tokens need no escaping — see the `cplace_execute_layout_script` tool description (quoting/escaping note). Never wrap it in a single-quoted string with unescaped inner `'` (throws `SyntaxError`).

**Validation**: Before setting this attribute, verify it exists on the type returned by the connected table's search. Using a non-existent or incorrectly quoted attribute results in a broken widget with no useful error message.