MCP Documentation Server

Instructions

Implementation Reference

• src/tools/searchDocs.ts:141-258 (handler)

  The complete search_docs tool object, including name, description, inputSchema reference, and the main execute handler that reads docs, searches, ranks, and formats results.
  export const searchDocs = { name: "search_docs", description: "Search through MCP documentation using keywords or phrases. Returns relevant documentation sections with context.", inputSchema: inputSchema.shape, async execute(args: z.infer<typeof inputSchema>) { const { query, category } = args; try { // Get path to scraped_docs directory const docsPath = docsDirectory; // Read all markdown files const files = readdirSync(docsPath).filter(file => file.endsWith('.md')); const results: SearchResult[] = []; for (const file of files) { const filePath = join(docsPath, file); const content = readFileSync(filePath, 'utf-8'); const fileCategory = categorizeFile(file); // Skip if category filter is specified and doesn't match if (category !== "all" && fileCategory !== category) { continue; } const relevance = calculateRelevance(content, query); // Only include files with some relevance if (relevance > 0) { const matches = findMatches(content, query); results.push({ file, title: extractTitle(content), content: content.substring(0, 500) + (content.length > 500 ? "..." : ""), category: fileCategory, relevance, matches }); } } // Sort by relevance results.sort((a, b) => b.relevance - a.relevance); if (results.length === 0) { return { content: [{ type: "text" as const, text: `No documentation found matching "${query}"${category !== "all" ? ` in category "${category}"` : ""}. Try: - Using different keywords - Searching in "all" categories - Using broader search terms - Checking spelling Available categories: getting_started, concepts, development, specification, tools, community` }] }; } // Format results let response = `# 🔍 Search Results for "${query}"\n\n`; response += `Found ${results.length} relevant document${results.length === 1 ? '' : 's'}`; if (category !== "all") { response += ` in category "${category}"`; } response += `:\n\n`; for (let i = 0; i < Math.min(results.length, 10); i++) { const result = results[i]; response += `## ${i + 1}. ${result.title}\n`; response += `**File**: \`${result.file}\` | **Category**: ${result.category} | **Relevance**: ${result.relevance.toFixed(0)}\n\n`; if (result.matches.length > 0) { response += `**Key matches:**\n`; for (const match of result.matches.slice(0, 3)) { response += `- Line ${match.line}: "${match.text.substring(0, 100)}${match.text.length > 100 ? '...' : ''}"\n`; } response += `\n`; } // Show snippet of content response += `**Preview**: ${result.content}\n\n`; response += `**Access full document**: Use resource \`mcp-docs://${result.file}\`\n\n`; response += `---\n\n`; } if (results.length > 10) { response += `*Showing top 10 results. ${results.length - 10} additional documents found.*\n\n`; } response += `## 💡 Tips\n`; response += `- Use \`get_docs_by_category\` to explore specific areas\n`; response += `- Access full documents using the resource URIs shown above\n`; response += `- Try more specific queries for better results\n`; return { content: [{ type: "text" as const, text: response }] }; } catch (error) { return { content: [{ type: "text" as const, text: `Error searching documentation: ${error instanceof Error ? error.message : String(error)}` }] }; } } };
• src/tools/searchDocs.ts:18-29 (schema)

  Zod input schema definition for the search_docs tool parameters.
  const inputSchema = z.object({ query: z.string().describe("Search query - keywords, phrases, or specific concepts to find in the documentation"), category: z.enum([ "all", "getting_started", "concepts", "development", "specification", "tools", "community" ]).default("all").describe("Optional: limit search to specific documentation category") });
• src/index.ts:125-154 (registration)

  Tool registration in the ListToolsRequestSchema handler, providing name, description, and static inputSchema for client discovery.
  { name: "search_docs", description: "Search through MCP documentation using keywords or phrases. Returns relevant documentation sections with context.", inputSchema: { type: "object", properties: { query: { type: "string", description: "Search query - keywords, phrases, or specific concepts to find in the documentation", }, category: { type: "string", enum: [ "all", "getting_started", "concepts", "development", "specification", "tools", "community", ], description: "Optional: limit search to specific documentation category", default: "all", }, }, required: ["query"], }, },
• src/index.ts:192-193 (registration)

  Dispatcher switch case in CallToolRequestSchema handler that routes calls to search_docs.execute.
  case "search_docs": return await searchDocs.execute(args as any);
• src/tools/searchDocs.ts:79-113 (helper)

  Helper function to calculate relevance score of a document to the search query, used in ranking results.
  function calculateRelevance(content: string, query: string): number { const queryLower = query.toLowerCase(); const contentLower = content.toLowerCase(); let score = 0; // Title match (high weight) const title = extractTitle(content).toLowerCase(); if (title.includes(queryLower)) { score += 100; } // Exact phrase match (high weight) const exactMatches = (contentLower.match(new RegExp(queryLower, 'g')) || []).length; score += exactMatches * 10; // Individual word matches (medium weight) const queryWords = queryLower.split(/\s+/); for (const word of queryWords) { if (word.length > 2) { const wordMatches = (contentLower.match(new RegExp(`\\b${word}\\b`, 'g')) || []).length; score += wordMatches * 2; } } // Content length penalty (prefer more focused content) const contentLength = content.length; if (contentLength > 10000) { score *= 0.8; } else if (contentLength < 1000) { score *= 1.2; } return score; }