Glossary AI

Tool Use

Also known as: Function Calling

When an AI agent calls a function, API, or external tool to get information or take action — instead of relying only on its trained knowledge. The capability that turns a chatbot into an agent. MCP standardizes how tools are exposed to models.

Related terms

Function Calling

The capability of an AI model to output structured calls to named functions with typed arguments — instead of free-text respons...

Grounding

Connecting an AI model's responses to real, verifiable information instead of letting it generate from training data alone. Don...

MCP (Model Context Protocol)

An open protocol created by Anthropic that lets AI models connect to external tools and data sources. The standard for the tool...

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