diff --git a/Makefile b/Makefile
index 0bb33085..99b9f5b1 100644
--- a/Makefile
+++ b/Makefile
@@ -70,8 +70,8 @@ some-containers:
 	    -t ${CONTAINER_BASE}/trustgraph-base:${VERSION} .
 	${DOCKER} build -f containers/Containerfile.flow \
 	    -t ${CONTAINER_BASE}/trustgraph-flow:${VERSION} .
-	${DOCKER} build -f containers/Containerfile.mcp \
-	    -t ${CONTAINER_BASE}/trustgraph-mcp:${VERSION} .
+#	${DOCKER} build -f containers/Containerfile.mcp \
+#	    -t ${CONTAINER_BASE}/trustgraph-mcp:${VERSION} .
 #	${DOCKER} build -f containers/Containerfile.vertexai \
 #	    -t ${CONTAINER_BASE}/trustgraph-vertexai:${VERSION} .
 #	${DOCKER} build -f containers/Containerfile.bedrock \
diff --git a/trustgraph-flow/trustgraph/librarian/librarian.py b/trustgraph-flow/trustgraph/librarian/librarian.py
index 59a71f48..53d83296 100644
--- a/trustgraph-flow/trustgraph/librarian/librarian.py
+++ b/trustgraph-flow/trustgraph/librarian/librarian.py
@@ -176,6 +176,9 @@ class Librarian:
 
         logger.debug("Adding processing metadata...")
 
+        if not request.processing_metadata.collection:
+            raise RuntimeError("Collection parameter is required")
+
         if await self.table_store.processing_exists(
                 request.processing_metadata.user,
                 request.processing_metadata.id