@arizeai/phoenix-mcp

--- description: Concepts that are important to understand when logging traces to Phoenix --- # Concepts: Tracing ## [What are Traces?](concepts-tracing.md#user-content-spans) <a href="#user-content-spans" id="user-content-spans"></a> * [What are spans](concepts-tracing/what-are-traces.md#user-content-spans) * [What are traces](concepts-tracing/what-are-traces.md#user-content-traces) * [What are span attributes](concepts-tracing/what-are-traces.md#span-attributes) * [What are span kinds](concepts-tracing/what-are-traces.md#span-kind) * [What are projects](concepts-tracing/what-are-traces.md#projects) ### [How does Tracing Work?](concepts-tracing/how-does-tracing-work.md) * [What is instrumentation?](concepts-tracing/how-does-tracing-work.md#instrumentation) * [What is a collector?](concepts-tracing/how-does-tracing-work.md#collector) * [What is an exporter?](concepts-tracing/how-does-tracing-work.md#exporter) * [What is OpenTelemetry Protocol (OTLP)?](concepts-tracing/how-does-tracing-work.md#opentelemetry-protocol)