modelcontextprotocol / modelcontextprotocol/ext-apps
Accessibility
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@liady is already working on this.
Since Jun 20, 2026.
enhancement
protocol
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Description
MCP Apps are rendered in a sandboxed iframe. Accessibility depends heavily on both the host and the app.
We should validate that the spec provides the hooks and constraints needed for strong accessibility (keyboard/focus management, screen reader support, labeling, theming/contrast, zoom/magnification behavior) and that apps must meet these expectations.
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