MCP Discovery: Why Your MCP Server Needs Better Tool Discovery Than You Think (After 85 Production Outages)

Short summary

LLMs frequently hallucinate tool names when calling MCP server endpoints, causing production outages. Implement a fuzzy matching layer using Levenshtein distance to detect near-misses and auto-correct or suggest alternatives. The author shares Spring Boot code from production systems that eliminated 85+ outages caused by poor tool discovery.

• •LLM tool name hallucination is the #1 cause of MCP server failures in production
• •Fuzzy matching with Levenshtein distance catches misnamed tool calls and provides recovery
• •Spring Boot OncePerRequestFilter implementation shows production-tested solution

Generated with AI, which can make mistakes.