diff --git a/plugins/permission-node/src/integration/createConditionExports.test.ts b/plugins/permission-node/src/integration/createConditionExports.test.ts
index 424b3c3c24..dad57e2b8b 100644
--- a/plugins/permission-node/src/integration/createConditionExports.test.ts
+++ b/plugins/permission-node/src/integration/createConditionExports.test.ts
@@ -46,7 +46,7 @@ const testIntegration = () =>
         description: 'Test rule 2',
         resourceType: 'test-resource',
         paramsSchema: z.object({
-          foo: z.string(),
+          foo: z.string().optional(),
         }),
         apply: (_resource: any) => false,
         toQuery: params => ({
@@ -76,12 +76,10 @@ describe('createConditionExports', () => {
         },
       });
 
-      expect(conditions.testRule2({ foo: 'baz' })).toEqual({
+      expect(conditions.testRule2({})).toEqual({
         rule: 'testRule2',
         resourceType: 'test-resource',
-        params: {
-          foo: 'baz',
-        },
+        params: {},
       });
     });
   });
diff --git a/plugins/permission-node/src/types.ts b/plugins/permission-node/src/types.ts
index 6b15df407e..36e30714f6 100644
--- a/plugins/permission-node/src/types.ts
+++ b/plugins/permission-node/src/types.ts
@@ -21,22 +21,6 @@ import type {
 import { z } from 'zod';
 import { NoInfer } from './integration/util';
 
-/**
- * A ZodSchema that reflects the structure of the parameters that are passed to
- * into a {@link PermissionRule}.
- *
- * @public
- */
-export type PermissionRuleSchema<TParams> = z.ZodObject<{
-  // Parameters can be optional, however we we want to make sure that the
-  // parameters are always present in the schema, even if they are undefined.
-  // We remove the optional flag from the schema, and then add it back in
-  // with an optional zod type.
-  [P in keyof TParams]-?: TParams[P] extends undefined
-    ? z.ZodOptionalType<z.ZodType<TParams[P]>>
-    : z.ZodType<TParams[P]>;
-}>;
-
 /**
  * A conditional rule that can be provided in an
  * {@link @backstage/permission-common#AuthorizeDecision} response to an authorization request.
@@ -66,24 +50,19 @@ export type PermissionRule<
   /**
    * A ZodSchema that reflects the structure of the parameters that are passed to
    */
-  paramsSchema?: PermissionRuleSchema<TParams>;
+  paramsSchema?: z.ZodSchema<TParams>;
 
   /**
    * Apply this rule to a resource already loaded from a backing data source. The params are
    * arguments supplied for the rule; for example, a rule could be `isOwner` with entityRefs as the
    * params.
    */
-  apply(
-    resource: TResource,
-    params: NoInfer<z.input<PermissionRuleSchema<TParams>>>,
-  ): boolean;
+  apply(resource: TResource, params: NoInfer<TParams>): boolean;
 
   /**
    * Translate this rule to criteria suitable for use in querying a backing data store. The criteria
    * can be used for loading a collection of resources efficiently with conditional criteria already
    * applied.
    */
-  toQuery(
-    params: NoInfer<z.input<PermissionRuleSchema<TParams>>>,
-  ): PermissionCriteria<TQuery>;
+  toQuery(params: NoInfer<TParams>): PermissionCriteria<TQuery>;
 };