27 tools from the Raven MCP Server, categorised by risk level.
View the Raven policy →audit_layout Evaluate visual rhythm from a rendered page's geometry. Call with no arguments to get a DevTools snippet to paste into your page — it prints {eleme... evaluate_design Evaluate a design description against UX principles. Returns relevant principles, potential violations, and improvement suggestions. get_brand_principles Get brand and visual-design principles — logo usage (clear space, min sizes, variants, placement, restraint), gradient usage (hierarchy, palette, c... get_brand_system Get a complete design system for building an app with branding like a specific company. Say 'Make me an app with branding like Spotify' and get the... get_brand_trends Get current brand and visual-design trends — what's working in 2026 and where each trend fits or fails. Includes bento grids, monospace type, neon-... get_business_strategy Get business and monetization strategies for digital products. Covers monetization models, retention strategies, onboarding optimization, growth me... get_checklist Get a pre-publish checklist for a specific UI type. Returns actionable yes/no items to verify before shipping. get_content_pattern Get content design patterns — copy recipes for error messages, empty-state copy, notifications, and form validation. Returns do's, don'ts, good/bad... get_content_principles Get UX-writing principles — clarity over cleverness, active voice, error-message anatomy, inclusive language, voice vs tone, and more. Filter by th... get_content_system Get a brand's content design system — voice attributes, tone shifts by context, vocabulary (use/avoid/never), grammar rules, content patterns for e... get_d4d_framework Get the Design for Delight (D4D) framework templates. Returns customer problem statement, ideal state, hypothesis, LOFA, and experiment templates f... get_design_system Get design tokens for a specific design system. Returns colors, typography, spacing, radii, elevation, and motion tokens in W3C DTCG, CSS custom pr... get_metrics_framework Get a product-metrics framework — HEART (Google), AARRR/Pirate (Dave McClure), North Star Metric, Conversion Funnel, RICE Scoring, or OKRs. Returns... get_pattern Get proven UI/UX patterns for a specific design type. Returns do's, don'ts, evidence, and checklists for signup flows, pricing pages, navigation, f... get_principles Get design principles relevant to a UI context. Returns usability heuristics, laws of UX, Gestalt principles, accessibility requirements, typograph... get_research_method Get research method details — qualitative (interviews, contextual inquiry, diary, field, intercept), quantitative (surveys, analytics, A/B tests, b... get_service_pattern Get a service design pattern — service blueprinting, human handoff, signup-as-service, omnichannel continuity, or moments of truth / recovery. Retu... get_service_standard Get the GOV.UK Service Standard — 14 points the UK government uses to assess whether a public service is ready to launch. Widely applicable as a ri... list_content_systems Browse available content design systems — brand voice and tone guides from real companies (Mailchimp, GOV.UK, Shopify Polaris, Atlassian, Intuit). ... list_design_systems Browse available design systems for tokens. Filter by category (fintech, productivity, developer, component-library, design-system) or search by name. raven_reflect Summarize how Raven has been used on this machine over the last N days. Reports which tools are called most, which audit warnings fire repeatedly (... search_knowledge Search across all design principles, UI patterns, and business strategies. Use when you need to find specific guidance or don't know which category... compose_system Mix tokens from different design systems to create a custom composite. Example: Linear's colors + Stripe's typography. generate_design_system Generate a complete, custom design system with full token set. Provide a brand color to auto-generate a harmonious palette, pick a style preset, an... generate_service_blueprint Render a service blueprint as a self-contained HTML page. Supports two modes: (1) classic Shostack single-actor blueprint — user action, frontstage... raven_register Register your email to receive design updates and provide feedback to the Raven creator. Call this when a user wants to register, give feedback, or... The Raven MCP server exposes 27 tools across 3 categories: Read, Write, Execute.
Use Intercept, the open-source MCP proxy. Write YAML rules for each tool — rate limits, argument validation, or deny rules — then run Intercept in front of the Raven server.
Raven tools are categorised as Read (22), Write (4), Execute (1). Each category has a recommended default policy.
Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.