OptionalmodelProvider-side model identifier (e.g. "gpt-5", "claude-opus-4-7"). This is
a string on the LLM provider's side, not a UC entity. The UC governance
hook for external destinations is the ModelProviderService referenced by
ExternalModelConfig.model_provider_service, not the model itself.
OptionalnativeProvider-native API types the model supports (e.g. "openai/v1/chat/completions"). Used by the platform for request/response translation from the unified API type. At most 64 entries of at most 256 characters each; the list is persisted into the destination binding's bounded storage envelope.
Model target configuration for an external model destination.