Model Context Protocol
An open protocol that standardizes how a model-facing application discovers and calls external tools and data sources, so a tool built once can be reused across any client that speaks the protocol rather than being wired into one specific agent framework.
Why exams ask this
Tested as a portability question: why write a tool integration once instead of once per agent framework. The exam wants MCP named as a standard interface between models and external tools or data sources, not as a specific vendor's proprietary plugin format.
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