Box Kite's MCP server runs your AI assistant's props through the real styling engine mid-task, and names each value that would render nothing. Below: the mistakes it catches, a worked session with every answer pasted from the server, and what it can't know about your project. It documents @box-kite/mcp 2.2.12.

The examples here are screenshots; they run live in the original article .

The problem

Three props an assistant wrote for a settings row, handed to the server:

check_styles { "props": { "jc": "between", "fontSize": 4, "lineHeight": 1.5 } }

Some of these write no CSS, or CSS they almost certainly did not mean.

- ❌ `jc` does not accept "between" — no rule and no class name were written. It takes start, end, flex-start, flex-end, center, left, right, space-between, space-around, space-evenly, stretch, safe center, … (17 in all — call `get_props`).…