Brand voice is an Anthropic marketing plugin that turns brand guideline materials into enforced tone-and-voice rules applied to everything drafted in Claude, from emails to slide decks.
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Brand Voice MCP is Anthropic's marketing Cowork plugin, reading in brand guideline material and enforcing a consistent tone and voice across everything drafted in Claude.
Whichever source it draws from -- material shared in the session, a project's stored `.claude/brand-voice-guidelines.md`, or guidelines generated through conversation -- the same rules carry through every email, slide, and Slack message written afterward. It treats "voice" (the brand's constant personality) separately from "tone" (which flexes by content and audience), so a formal press release and a casual internal update can both stay in the same brand personality while reading in appropriately different tones.
BuildersgateGG lists Brand Voice MCP as a tool for keeping brand consistency in marketing and communications work.
It's Anthropic's marketing Cowork plugin that reads brand guideline material and applies a consistent tone and voice to everything drafted in Claude.
Yes, if none exists it can generate a new brand-voice guideline through conversation.
Voice is the brand's constant personality; tone is how that personality flexes by content and audience -- Brand Voice MCP applies both separately.
Most content drafted in Claude, including emails, slides, and Slack messages.
Yes, a project can store its own guidelines in a `.claude/brand-voice-guidelines.md` file, which is referenced automatically for that project's work.