Model Context Protocol (MCP) vs Function Calling vs OpenAPI Tools — When to Use Each?
Table of contents Comparison Table Strengths and Limits Security and Governance Ecosystem Signals (Portability/Adoption) Decision Rules (When to Use Which) References: MCP (Model Context Protocol): Open, transport-agnostic protocol that standardizes discovery and invocation of instruments/assets throughout hosts and servers. Best for moveable, multi-tool, multi-runtime methods. Function Calling: Vendor characteristic the place the mannequin selects a…