_meta.ui.csp. Specifies which network destinations a widget can reach — connectDomains for fetch/XHR/WebSocket, resourceDomains for images and media. Anything not declared is blocked.
Data-only response
An MCP tool response that contains data but no UI payload. Alexa renders data-only responses through its native hydration layer.
Design token
A named variable in the Alexa design system representing a specific visual value such as a typography size, spacing measurement, or corner radius. Tokens ensure consistency across components and surfaces.
Fullscreen mode
An expanded display mode that provides more screen real estate for complex interactions such as games, maps, and information-dense content.
Inline mode
The default display mode for MCP add-ons. Content renders directly within the conversation flow. Used for confirmations, summaries, and most add-on responses.
Invocation name
The word or phrase customers say to activate a specific add-on. For example, “Alexa, open [invocation name].” Also the name that appears in the store listing.
MCP add-on
An add-on built using the Model Context Protocol that deploys custom UI directly into the Alexa+ interface. The developer builds and ships the experience; Alexa renders it.
Root scale
A single scale factor applied at the root element of a widget to adapt it to a specific device class. For Echo Show 8/15 (1280×800), the root scale is 1.667.
UI payload
The visual component returned by an MCP add-on in its tool response. When a UI payload is provided, Alexa renders it directly in the interface.
Voice-only mode
The display mode used automatically on Alexa devices without a screen. All content must be intelligible without any visual support.
VoiceView
Amazon’s screen reader for Alexa devices. When VoiceView is enabled, on-screen content is navigated by touch and read aloud. Add-ons must function correctly with VoiceView enabled.
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