diff --git a/lib/ash/resource.ex b/lib/ash/resource.ex
index c279303d7..7e0a7360c 100644
--- a/lib/ash/resource.ex
+++ b/lib/ash/resource.ex
@@ -5,12 +5,6 @@ defmodule Ash.Resource do
   [Resource DSL documentation](dsl-ash-resource.html)
   """
 
-  def foo do
-    # x + y + z
-
-    1 - 2 - 3
-  end
-
   @type t :: module
   @type record :: struct()
 
@@ -39,6 +33,12 @@ defmodule Ash.Resource do
         doc: "Whether or not to validate that this resource is included in a domain.",
         default: true
       ],
+      primary_read_warning?: [
+        type: :boolean,
+        doc:
+          "Set to `false` to silence warnings about arguments, preparations and filters on the primary read action.",
+        default: true
+      ],
       domain: [
         type: {:behaviour, Ash.Domain},
         doc:
@@ -123,6 +123,7 @@ defmodule Ash.Resource do
             embed_nil_values?: opts[:embed_nil_values?]
           ] do
       @persist {:simple_notifiers, List.wrap(opts[:simple_notifiers])}
+      @persist {:primary_read_warning?, Keyword.get(opts, :primary_read_warning?, true)}
 
       if !(embedded? || has_domain?) do
         IO.warn("""
diff --git a/lib/ash/resource/dsl.ex b/lib/ash/resource/dsl.ex
index 40c513497..c443b6bf2 100644
--- a/lib/ash/resource/dsl.ex
+++ b/lib/ash/resource/dsl.ex
@@ -1509,6 +1509,7 @@ defmodule Ash.Resource.Dsl do
     Ash.Resource.Verifiers.ValidateRelationshipAttributesMatch,
     Ash.Resource.Verifiers.VerifyReservedCalculationArguments,
     Ash.Resource.Verifiers.VerifyIdentityFields,
+    Ash.Resource.Verifiers.VerifyPrimaryReadActionHasNoArguments,
     Ash.Resource.Verifiers.VerifySelectedByDefault,
     Ash.Resource.Verifiers.EnsureAggregateFieldIsAttributeOrCalculation,
     Ash.Resource.Verifiers.ValidateRelationshipAttributes,
diff --git a/lib/ash/resource/verifiers/verify_primary_read_action_has_no_arguments.ex b/lib/ash/resource/verifiers/verify_primary_read_action_has_no_arguments.ex
new file mode 100644
index 000000000..b4eeb89d5
--- /dev/null
+++ b/lib/ash/resource/verifiers/verify_primary_read_action_has_no_arguments.ex
@@ -0,0 +1,53 @@
+defmodule Ash.Resource.Verifiers.VerifyPrimaryReadActionHasNoArguments do
+  @moduledoc "Verifies that primary read actions do not have any arguments"
+  use Spark.Dsl.Verifier
+
+  def verify(dsl) do
+    resource = Spark.Dsl.Verifier.get_persisted(dsl, :module)
+
+    if Spark.Dsl.Verifier.get_persisted(dsl, :primary_read_warning?) do
+      dsl
+      |> Ash.Resource.Info.actions()
+      |> Enum.find(&(&1.type == :read && &1.primary?))
+      |> case do
+        nil ->
+          :ok
+
+        action ->
+          if action.arguments != [] do
+            IO.warn(warning(resource, action, "arguments"))
+          end
+
+          if action.filter not in [nil, []] do
+            IO.warn(warning(resource, action, "filters"))
+          end
+
+          if action.preparations != [] &&
+               Ash.Resource.Info.data_layer(resource) != Ash.DataLayer.Simple do
+            IO.warn(warning(resource, action, "preparations"))
+          end
+
+          :ok
+      end
+    else
+      :ok
+    end
+  end
+
+  defp warning(resource, action, things) do
+    """
+    Primary read action `#{inspect(resource)}.#{action.name}` has #{things}.
+
+    This is often done by mistake, but can also be done intentionally.
+
+    Primary read actions are used when loading relationships, checking policies and more.
+    It is okay to have optional arguments, but required arguments are almost never desired.
+
+    If you intended to have #{things} on your primary read action, add `primary_read_warning?: false`
+    to `use Ash.Resource`. For example:
+
+        use Ash.Resource,
+          primary_read_warning?: false
+    """
+  end
+end