diff --git a/develop-docs/sdk/data-model/envelope-items.mdx b/develop-docs/sdk/data-model/envelope-items.mdx
index 4c466e05bf463..ddb990ff2dd07 100644
--- a/develop-docs/sdk/data-model/envelope-items.mdx
+++ b/develop-docs/sdk/data-model/envelope-items.mdx
@@ -430,7 +430,9 @@ _None_
 
 **Additional Item Headers:**
 
-_None_
+`platform`
+
+: **String, required.** The platform of the profiled application. This item header is used for rate limiting and categorization. It must match the `platform` in the payload. the Examples: `"javascript"`, `"node"`, `"python"`, `"cocoa"`, etc.
 
 ### Check-Ins
 
diff --git a/develop-docs/sdk/telemetry/profiles/sample-format-v2.mdx b/develop-docs/sdk/telemetry/profiles/sample-format-v2.mdx
index 26c176534e584..cc0fa464dc379 100644
--- a/develop-docs/sdk/telemetry/profiles/sample-format-v2.mdx
+++ b/develop-docs/sdk/telemetry/profiles/sample-format-v2.mdx
@@ -280,17 +280,15 @@ It's suggested to remove unnecessary data like thread data without samples from
 
 ## Ingestion
 
-After this payload is generated, serialize it as JSON, pack it into an
+After this payload is generated, serialize it as JSON, pack it into an [Envelope](/sdk/data-model/envelopes/) with the item type [`profile_chunk`](/sdk/data-model/envelope-items/#profile-chunk) and send it to Relay.
 
-[Envelope](/sdk/data-model/envelopes/) with the item type [`profile_chunk`](/sdk/data-model/envelope-items/#profile-chunk) and send
-
-it to Relay.
+The `platform` item header is required for rate limiting and categorization of the profile chunk and must match the `platform` in the payload.
 
 This envelope should look like this:
 
 ```json
 {"event_id":"a229377b82ad4898be7c3a6272d052d9"}
-{"type":"profile_chunk"}
+{"type":"profile_chunk", "platform":"node"}
 { /* profile_chunk JSON payload */}
 ````