MCP Schema Validation Failed: How to Diagnose and Fix the Problem

Diagnose MCP schema validation errors by inspecting JSON-RPC tool parameters, fixing mismatched parameter types, ensuring required properties exist, and validating JSON Schema draft versions.

When an AI agent invokes an MCP tool, the server returns `-32602 Invalid params` or `Schema Validation Failed`. The agent frequently retries with identical parameters, creating an expensive error loop.