GEO glossary
Tool Calling
Tool Calling is a model's ability to request a function or external service during a task.
Why this matters for GEO
Well-described APIs can make verified business information available to agents.
Related terms
- Model Context Protocol (MCP)
- API Discoverability
- AI Shopping Recommendation
- Content Provenance Metadata
- AI Agent
- Agentic Commerce
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All 150 GEO and AI visibility terms
Updated November 2026.