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Model Context Protocol (MCP)
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What is an...
What is an MCP Tool, and how does it differ from a Resource?
A Tool is a function the server exposes that the model can call, and it may have side effects (e.g., write to a file, call an external API); Resources are read-only data
A Tool is a read-only endpoint, while a Resource is a callable function with side effects
Tools and Resources are interchangeable terms in MCP — both refer to callable server capabilities
A Tool is a built-in capability of the AI model itself, not something provided by the MCP server
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