diff --git a/core/rawdb/ancient_scheme.go b/core/rawdb/ancient_scheme.go
index f042ffeefe..1ffebed3e7 100644
--- a/core/rawdb/ancient_scheme.go
+++ b/core/rawdb/ancient_scheme.go
@@ -37,8 +37,10 @@ const (
 	ChainFreezerReceiptTable = "receipts"
 )
 
-// chainFreezerTableConfigs configures whether compression is disabled for the ancient-tables.
-// Hashes and difficulties don't compress well.
+// chainFreezerTableConfigs configures the settings for tables in the chain freezer.
+// Compression is disabled for hashes as they don't compress well. Additionally,
+// tail truncation is disabled for the header and hash tables, as these are intended
+// to be retained long-term.
 var chainFreezerTableConfigs = map[string]freezerTableConfig{
 	ChainFreezerHeaderTable:  {noSnappy: false, prunable: false},
 	ChainFreezerHashTable:    {noSnappy: true, prunable: false},
@@ -46,6 +48,7 @@ var chainFreezerTableConfigs = map[string]freezerTableConfig{
 	ChainFreezerReceiptTable: {noSnappy: false, prunable: true},
 }
 
+// freezerTableConfig contains the settings for a freezer table.
 type freezerTableConfig struct {
 	noSnappy bool // disables item compression
 	prunable bool // true for tables that can be pruned by TruncateTail
@@ -63,7 +66,7 @@ const (
 	stateHistoryStorageData  = "storage.data"
 )
 
-// stateFreezerTableConfigs configures whether compression is disabled for the state freezer.
+// stateFreezerTableConfigs configures the settings for tables in the state freezer.
 var stateFreezerTableConfigs = map[string]freezerTableConfig{
 	stateHistoryMeta:         {noSnappy: true, prunable: true},
 	stateHistoryAccountIndex: {noSnappy: false, prunable: true},
diff --git a/core/rawdb/freezer.go b/core/rawdb/freezer.go
index b0d046b1f7..105d3af934 100644
--- a/core/rawdb/freezer.go
+++ b/core/rawdb/freezer.go
@@ -301,9 +301,8 @@ func (f *Freezer) TruncateHead(items uint64) (uint64, error) {
 	return oitems, nil
 }
 
-// TruncateTail discards all data below the provided threshold number
-// Note this will only truncate 'prunable' tables. Block headers and canonical
-// hashes cannot be truncated at this time.
+// TruncateTail discards all data below the specified threshold. Note that only
+// 'prunable' tables will be truncated.
 func (f *Freezer) TruncateTail(tail uint64) (uint64, error) {
 	if f.readonly {
 		return 0, errReadOnly
diff --git a/ethdb/database.go b/ethdb/database.go
index 2b0fe9c307..b1577512f3 100644
--- a/ethdb/database.go
+++ b/ethdb/database.go
@@ -129,8 +129,7 @@ type AncientWriter interface {
 	// immediately, but only when the accumulated deleted data reach the threshold then
 	// will be removed all together.
 	//
-	// Note this will only truncate 'prunable' tables. Block headers and canonical
-	// hashes cannot be truncated at this time.
+	// Note that data marked as non-prunable will still be retained and remain accessible.
 	TruncateTail(n uint64) (uint64, error)
 
 	// Sync flushes all in-memory ancient store data to disk.