diff --git a/src/lib/action.ts b/src/lib/action.ts
index 18ed681..92ec121 100644
--- a/src/lib/action.ts
+++ b/src/lib/action.ts
@@ -89,8 +89,8 @@ export const protectedAction = authActionClient.use(async ({ next, ctx, parsedIn
     }
   });
 
-  if (!projectMember || !hasProjectPermission(projectMember.role, requiredRoles)) {
-    throw new Error('Not authorized to perform this action on this project.');
+  if (!projectMember || hasProjectPermission(projectMember.role, requiredRoles).success === false) {
+    throw new Error('Permission denied: Not authorized to perform this action on this project.');
   }
 
   return next({
diff --git a/src/lib/permissions.ts b/src/lib/permissions.ts
index cd2b58f..c58f307 100644
--- a/src/lib/permissions.ts
+++ b/src/lib/permissions.ts
@@ -1,13 +1,23 @@
 import { Role } from '@/generated/prisma/client';
+import { Result, success, error, ErrorCodes } from '@/lib/result';
 
-export function hasProjectPermission(userRole: Role, requiredRoles: Role[]): boolean {
-  return requiredRoles.includes(userRole);
+export function hasProjectPermission(userRole: Role, requiredRoles: Role[]): Result<boolean> {
+  if (requiredRoles.includes(userRole)) {
+    return success(true);
+  }
+  return error<boolean>("Permission denied", ErrorCodes.FORBIDDEN);
 }
 
-export function isProjectAdmin(userRole: Role): boolean {
-  return userRole === Role.ADMIN;
+export function isProjectAdmin(userRole: Role): Result<boolean> {
+  if (userRole === Role.ADMIN) {
+    return success(true);
+  }
+  return error<boolean>("Permission denied", ErrorCodes.FORBIDDEN);
 }
 
-export function isProjectMember(userRole: Role): boolean {
-  return userRole === Role.USER || userRole === Role.ADMIN;
+export function isProjectMember(userRole: Role): Result<boolean> {
+  if (userRole === Role.USER || userRole === Role.ADMIN) {
+    return success(true);
+  }
+  return error<boolean>("Permission denied", ErrorCodes.FORBIDDEN);
 }