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Your MCP Servers Are Silently Draining Your Context Window: The Hidden Cost of Tool-Heavy AI Agents

I typed a two-word prompt— "Run tests" —into my AI coding agent, and my API billing dashboard immediately registered 28,400 input tokens . I had not attached a single source file. My conversation history was completely empty. Yet nearly 15% of my model's active context window evaporated before the…

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  1. 2026-11-12 16:30 · DEV Community — AI
    Your MCP Servers Are Silently Draining Your Context Window: The Hidden Cost of Tool-Heavy AI Agents

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