diff --git a/roles/container/tasks/main.yaml b/roles/container/tasks/main.yaml
index 0d30173..ae88e57 100644
--- a/roles/container/tasks/main.yaml
+++ b/roles/container/tasks/main.yaml
@@ -1,4 +1,7 @@
 ---
+- name: Validate inputs
+  ansible.builtin.import_tasks: validation.yaml
+
 - name: Create networks for container {{ container_name }}
   ansible.builtin.include_role:
     name: network
diff --git a/roles/container/tasks/validation.yaml b/roles/container/tasks/validation.yaml
new file mode 100644
index 0000000..7f674b1
--- /dev/null
+++ b/roles/container/tasks/validation.yaml
@@ -0,0 +1,8 @@
+---
+- name: Assert mount sources and destinations are unique
+  ansible.builtin.assert:
+    that:
+      - _container_mount_destinations | unique | length == _container_mount_destinations | length
+      - _container_mount_sources | unique | length == _container_mount_sources | length
+    fail_msg: "Container mount sources and destinations must be unique. Failed with mounts: {{ container_mounts }}"
+    quiet: true