maidr and browser AI agents (WebMCP)

In a browser with WebMCP, this chart is offered to the browser's AI agent as three tools: maidr_list_charts, maidr_get_layer_data and maidr_navigate. The agent can then answer questions such as "which day had the most tips?" from the chart's data, or move your position to a bar when you ask.

How to test

1. In Chrome, open chrome://flags/#enable-webmcp-testing, set it to Enabled, and relaunch.
2. Install the Model Context Tool Inspector extension and open it on this page. It lists the three tools and can call them: start with maidr_list_charts and {}.
3. Call maidr_navigate with {"layerId": "tips", "row": 0, "col": 2} while you are in the chart (click it or Tab to it): your screen reader announces Thursday, exactly as an arrow key would.
4. Open Settings (Ctrl + ,, or Cmd + , on a Mac), uncheck Browser AI Agent Access on the General tab and save: the tools disappear from the inspector without a reload. Check it again to bring them back.

The page must be served over https or from localhost. See Browser AI Agents (WebMCP) for the tools, what they return, and how a page author can switch them off.