React Flow MCP demonstrates solid tool design with clear naming conventions (all tools start with action verbs: list, get, search, generate), comprehensive descriptions (avg 120 chars), and well-structured input schemas. All 9 tools have explicit type definitions and parameter descriptions. However, output schemas are not documented in the visible code, tool implementations reference data structures (ApiEntry, patterns, templates) but return types are not formally declared in the tool registration. Error handling is minimal; tools lack recovery guidance and actionable error messages. The server is read-only (no state mutations), which simplifies composition but limits real-world utility. Tool descriptions are adequate but could be more prescriptive about when to use each tool vs. alternatives (e.g., when to call search-docs vs. get-api).

• Document output schemas for all tools. For get-api, declare: { name: string, kind: string, description: string, props: Array<{name, type, description}>, examples: Array<{title, code}>, tips: string[], relatedApis: string[] }. For search-docs, declare: { results: Array<{name, kind, relevance_score}>, total_count: number }. This enables LLMs to extract and chain results.
• Add error handling descriptions to each tool. E.g., get-api: 'Returns error if API name not found. Call list-apis to discover valid names.' get-pattern: 'Returns error if pattern name is invalid. Call list-apis with kind="pattern" to see available patterns.'
• Clarify tool selection in descriptions. Rewrite search-docs: 'Search React Flow documentation by keyword for discovery. Use when you don't know the exact API name. For direct API lookup, use get-api.' Rewrite get-api: 'Retrieve detailed documentation for a specific API by exact name. Use when you know the API name; for keyword search, use search-docs.'
• Add format guidance and examples to generate-flow description parameter. E.g., 'Description of the flow (e.g., "A workflow with 3 nodes: start, process, end" or "A state machine with states: idle, loading, error, success"). Keep descriptions under 200 characters and focus on node count, types, and relationships.'
• Enhance cheatsheet description. E.g., 'Get a quick reference cheatsheet for React Flow v12 with common imports, component signatures, hook patterns, and API shortcuts. Use this for rapid lookup of syntax and common patterns without detailed explanations.'