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MCP Protocol Sparks Developer Debate Over Token Costs and Context Bloat

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A blog post titled 'Why MCP Was Always a Bad Idea' has reignited debate over the Model Context Protocol, arguing it was designed for 2024-era AI models and imposes unnecessary token costs and context bloat. The post gained traction on Hacker News, attracting around 165 upvotes and over 100 comments within roughly 13 hours, while also drawing divided reactions on X. Critics contend that MCP tool definitions, schemas, and server handshakes consume valuable context on every call, driving up costs without proportional benefit. Defenders counter that MCP's explicit tool boundaries offer meaningful sandboxing and auditability advantages, particularly for agents without full system access. The core disagreement is not whether the protocol works, but whether its overhead is justified given how modern AI agents are actually deployed.

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