---
title: "TelemetryContext"
description: "the W3C trace context every call, event and message carries: the trace id, the parent span, and the attributes the platform adds"
section: concepts
address: /concepts/telemetrycontext
contract: 0476e35e6e275db5
---

# TelemetryContext

the W3C trace context every call, event and message carries: the trace id, the parent span, and the attributes the platform adds

[figure: TelemetryContext is a value at none scope. The drawing shows its fields and the objects that they point at.]

| property | value |
|---|---|
| kind | value |
| scope | none |
| key | none |
| store | none |
| family | observability |



## Fields


| field | type | required | note |
|---|---|---|---|
| `trace_id` | `hash` | yes |  |
| `parent_span_id` | `hash` | no |  |
| `tenant` | `id` | no |  |
| `scope` | [Scope](/concepts/scope) | no |  |
| `tool` | `text` | no |  |
| `job_key` | `text` | no | the durable job's idempotency key, so a trace and a job are joined |



## Routes that use it
No route takes or returns TelemetryContext directly. The record holds it, and the objects that point at it reach it.