Agent Platform Deep Dive (Part 4) — Provider Router & MCP: Multi-Provider Routing, Fallback Chains, and an OpenAI-Compatible Proxy
The Provider Router is Agent Platform's model and tool gateway: it unifies 30+ providers, MCP tool discovery, step-local permission control, fallback chains with RRF fusion, and an OpenAI-compatible Proxy that existing SDKs can use without code changes. It is configuration-driven rather than hard-coded, with provider-health-aware routing.