diff --git a/apis/validator/beacon_committee_selections.yaml b/apis/validator/beacon_committee_selections.yaml
index c906012e..991b5ee4 100644
--- a/apis/validator/beacon_committee_selections.yaml
+++ b/apis/validator/beacon_committee_selections.yaml
@@ -5,8 +5,10 @@ post:
     This endpoint should be used by a validator client running as part of a distributed validator cluster, and is 
     implemented by a distributed validator middleware client. This endpoint is used to exchange partial 
     selection proofs for combined/aggregated selection proofs to allow a validator client 
-    to correctly determine if one of its validators has been selected to perform an aggregation duty in this slot. 
-    Consensus clients need not support this endpoint and may return a 501.
+    to correctly determine if any of its validators has been selected to perform an attestation aggregation duty in a slot. 
+    Validator clients running in a distributed validator cluster must query this endpoint at the start of an epoch for the current and lookahead (next) epochs for
+    all validators that have attester duties in the current and lookahead epochs. Consensus clients need not support this
+    endpoint and may return a 501.
   tags:
     - Validator
   requestBody:
diff --git a/apis/validator/sync_committee_selections.yaml b/apis/validator/sync_committee_selections.yaml
index 857009fd..a04c3f6a 100644
--- a/apis/validator/sync_committee_selections.yaml
+++ b/apis/validator/sync_committee_selections.yaml
@@ -5,10 +5,11 @@ post:
     Submit sync committee selections to a DVT middleware client. It returns the threshold aggregated sync 
     committee selection. This endpoint should be used by a validator client running as part of a distributed 
     validator cluster, and is implemented by a distributed validator middleware client. This endpoint is 
-    used to exchange partial selection proof slot signatures for combined/aggregated selection proofs to 
-    allow a validator client to correctly determine if one of its validators has been selected to perform 
-    a sync committee contribution (sync aggregation) duty in this slot. Consensus clients need not support 
-    this endpoint and may return a 501.
+    used to exchange partial selection proofs (slot signatures) for combined/aggregated selection proofs to 
+    allow a validator client to correctly determine if any of its validators has been selected to perform a 
+    sync committee contribution (sync aggregation) duty in a slot. Validator clients running in a distributed validator cluster must query this endpoint
+    at the start of each slot for all validators that are included in the current sync committee. Consensus
+    clients need not support this endpoint and may return a 501.
   tags:
     - Validator
   requestBody: