diff --git a/trustgraph/embeddings/hf/hf.py b/trustgraph/embeddings/hf/hf.py
index 33890483..671ba879 100755
--- a/trustgraph/embeddings/hf/hf.py
+++ b/trustgraph/embeddings/hf/hf.py
@@ -1,7 +1,7 @@
 
 """
-Simple LLM service, performs text prompt completion using an Ollama service.
-Input is prompt, output is response.
+Embeddings service, applies an embeddings model selected from HuggingFace.
+Input is text, output is embeddings vector.
 """
 
 import pulsar
diff --git a/trustgraph/embeddings/vectorize/vectorize.py b/trustgraph/embeddings/vectorize/vectorize.py
index b362470d..99ee6013 100755
--- a/trustgraph/embeddings/vectorize/vectorize.py
+++ b/trustgraph/embeddings/vectorize/vectorize.py
@@ -1,7 +1,7 @@
 
 """
-Vectorizer, applies an embedding algorithm to a chunk.  Input is a chunk,
-output is chunk and vectors.
+Vectorizer, calls the embeddings service to get embeddings for a chunk.
+Input is text chunk, output is chunk and vectors.
 """
 
 import pulsar
diff --git a/trustgraph/graph/cassandra_write/write.py b/trustgraph/graph/cassandra_write/write.py
index 1b56b5ab..f8603a63 100755
--- a/trustgraph/graph/cassandra_write/write.py
+++ b/trustgraph/graph/cassandra_write/write.py
@@ -1,7 +1,6 @@
 
 """
-Simple decoder, accepts PDF documents on input, outputs pages from the
-PDF document as text as separate output objects.
+Graph writer.  Input is graph edge.  Writes edges to Cassandra graph.
 """
 
 import pulsar
diff --git a/trustgraph/kg/extract_definitions/extract.py b/trustgraph/kg/extract_definitions/extract.py
index 369aef59..513fd726 100755
--- a/trustgraph/kg/extract_definitions/extract.py
+++ b/trustgraph/kg/extract_definitions/extract.py
@@ -1,7 +1,7 @@
 
 """
-Simple decoder, accepts PDF documents on input, outputs pages from the
-PDF document as text as separate output objects.
+Simple decoder, accepts vector+text chunks input, applies entity analysis to
+get entity definitions which are output as graph edges.
 """
 
 import pulsar
diff --git a/trustgraph/kg/extract_relationships/extract.py b/trustgraph/kg/extract_relationships/extract.py
index a47c3b6e..cd7d1aa1 100755
--- a/trustgraph/kg/extract_relationships/extract.py
+++ b/trustgraph/kg/extract_relationships/extract.py
@@ -1,7 +1,8 @@
 
 """
-Simple decoder, accepts PDF documents on input, outputs pages from the
-PDF document as text as separate output objects.
+Simple decoder, accepts vector+text chunks input, applies entity
+relationship analysis to get entity relationship edges which are output as
+graph edges.
 """
 
 import pulsar
diff --git a/trustgraph/llm/azure_text/llm.py b/trustgraph/llm/azure_text/llm.py
index c4f47b6a..26030920 100755
--- a/trustgraph/llm/azure_text/llm.py
+++ b/trustgraph/llm/azure_text/llm.py
@@ -1,7 +1,7 @@
 
 """
-Simple LLM service, performs text prompt completion using an Ollama service.
-Input is prompt, output is response.
+Simple LLM service, performs text prompt completion using the Azure
+serverless endpoint service.  Input is prompt, output is response.
 """
 
 import pulsar
diff --git a/trustgraph/llm/vertexai_text/llm.py b/trustgraph/llm/vertexai_text/llm.py
index 44b55e62..d108b6da 100755
--- a/trustgraph/llm/vertexai_text/llm.py
+++ b/trustgraph/llm/vertexai_text/llm.py
@@ -1,7 +1,7 @@
 
 """
-Simple LLM service, performs text prompt completion using an Ollama service.
-Input is prompt, output is response.
+Simple LLM service, performs text prompt completion using VertexAI on
+Google Cloud.   Input is prompt, output is response.
 """
 
 import pulsar
diff --git a/trustgraph/vector/milvus_write/write.py b/trustgraph/vector/milvus_write/write.py
index 6a5700d9..67bdcd62 100755
--- a/trustgraph/vector/milvus_write/write.py
+++ b/trustgraph/vector/milvus_write/write.py
@@ -1,7 +1,6 @@
 
 """
-Simple decoder, accepts PDF documents on input, outputs pages from the
-PDF document as text as separate output objects.
+Accepts entity/vector pairs and writes them to a Milvus store.
 """
 
 import pulsar