The Model Context Protocol (MCP) allows LLMs to interact with external software systems through resources, prompts, and tools. However, MCP's categories are confusing and arbitrary, with existing standards like OpenAPI, gRPC, and CLIs already serving similar purposes effectively. Arguments for MCP's necessity include context window limitations and poor service documentation, but these seem temporary given rapidly expanding token limits and well-documented SaaS APIs. The protocol appears to be a temporary solution that duplicates existing, proven standards.
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