MCP: support dashboard tabs and explicit card dimensions

What problem will this feature request solve?

The connected Metabase MCP can create dashboards and add questions, but the exposed tools do not let an agent create/rename/reorder tabs, move cards between tabs, or set exact card dimensions. A dashboard with many questions therefore still needs manual UI editing.

Describe the solution you'd like.

• Create, rename, and reorder dashboard tabs, and assign/move cards to them.
• Set explicit card width and height (for example, full width / 24 columns and height 12), including resizing existing cards in place.
• Return tab IDs and card positions/dimensions so the result can be verified.

The current size presets do not cover full width with height 12: full is 24×9, while tall is 9×12.

How does this feature request impact you?

We can build the questions through MCP, but must switch to browser automation to finish a simple three-tab dashboard with consistent card sizes.

Additional information

Observed with the connected update_dashboard tool, whose available card actions are add/remove/move and whose size choices are wide/tall/full. This request is about the capabilities exposed to MCP clients, not whether the regular Metabase UI supports them.