MCP Servers Can Consume Over 111,000 Tokens Before You Ask a Single Question

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A developer audited 10 commonly used MCP servers and found they collectively inject over 111,700 tokens into an AI agent's context window before any user query is processed. The Google Drive MCP server alone accounted for 47,293 tokens — roughly 5% of the entire works of Shakespeare — just to list files. At Claude 3.5 Sonnet pricing, running 10 MCP servers across a typical workday could cost up to $2,376 per year. The token bloat also degrades agent performance: with heavy MCP usage, over half the context window is consumed by tool schemas, reducing reasoning capacity and conversation longevity. The author found that several of their own MCP servers went unused weekly and had direct CLI alternatives, prompting a shift away from MCP-based tooling.

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