diff --git a/06-Job-Declaration-Protocol.md b/06-Job-Declaration-Protocol.md
index 389c369..97fd791 100644
--- a/06-Job-Declaration-Protocol.md
+++ b/06-Job-Declaration-Protocol.md
@@ -100,6 +100,12 @@ More specifically, the `SipHash 2-4` variant is used. Aside from the preimage (w
 
 ### 6.3.5 `DeclareMiningJob.Success` (Server -> Client)
 
+A response sent by JDS acknowledging some Custom Job declaration.
+
+xxx todo xxx clarify `new_mining_job_token` with regards to:
+- async mining (`SetCustomMiningJob`)
+- potential JDS signature
+
 | Field Name           | Data Type | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
 | -------------------- | --------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | request_id           | U32       | Identifier of the original request                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
@@ -107,6 +113,10 @@ More specifically, the `SipHash 2-4` variant is used. Aside from the preimage (w
 
 ### 6.3.6 `DeclareMiningJob.Error` (Server->Client)
 
+A response sent by JDS rejecting some Custom Job declaration.
+
+This should be a trigger for fallback into some other Pool+JDS or solo mining.
+
 | Field Name    | Data Type | Description                                            |
 | ------------- | --------- | ------------------------------------------------------ |
 | request_id    | U32       | Identifier of the original request                     |