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Building a Reliable Financial Assistant with Model Context Protocol

This guide details building a reliable personal financial assistant using the Model Context Protocol (MCP) and a "Narrator" architectural pattern. By separating deterministic data computation in Python from LLM narration, the system ensures factual accuracy, reduces hallucinations, and provides auditable, data-backed financial insights. It covers MCP client wrappers, budget enforcement, simple request parsing, and precise metric calculation.