diff --git a/libs/features/overview-route/src/lib/RegisterDeployment/AssumeARNRole.tsx b/libs/features/overview-route/src/lib/RegisterDeployment/AssumeARNRole.tsx
index 59986d1b..f2f6fe59 100644
--- a/libs/features/overview-route/src/lib/RegisterDeployment/AssumeARNRole.tsx
+++ b/libs/features/overview-route/src/lib/RegisterDeployment/AssumeARNRole.tsx
@@ -1,5 +1,6 @@
 import { FormFieldInput } from '@restate/ui/form-field';
 import { useRegisterDeploymentContext } from './Context';
+import { InlineTooltip } from '@restate/ui/tooltip';
 
 export function AssumeARNRole() {
   const { updateAssumeRoleArn, assumeRoleArn } = useRegisterDeploymentContext();
@@ -7,15 +8,30 @@ export function AssumeARNRole() {
   return (
     <FormFieldInput
       name="assume_role_arn"
-      placeholder="arn:aws:sts::{acc}:assumed-role/{role}/{func}"
-      pattern="^arn:aws:sts::(\d{12}):assumed-role\/([^\/]+)\/([^\/]+)$"
+      placeholder="arn:aws:iam::{account}:role/{role-name}"
+      pattern="^arn:aws:iam::\d{12}:role(\/[\w-]+)*\/[\w+-]+$"
       value={assumeRoleArn}
       onChange={updateAssumeRoleArn}
       label={
         <>
-          <span slot="title">Assume role ARN</span>
+          <span slot="title">
+            <InlineTooltip
+              title="Assumed role"
+              description={
+                <p>
+                  This role must exist in your account, it must trust Restate
+                  Cloud to assume it, and it must have permission to invoke the
+                  Lambda function containing the handler.
+                </p>
+              }
+              learnMoreHref="https://docs.restate.dev/deploy/server/cloud#aws-lambda-services"
+            >
+              Role ARN
+            </InlineTooltip>
+          </span>
           <span slot="description" className="leading-5 text-code block">
-            ARN of a role to use when invoking the Lambda
+            AWS role ARN that Restate Cloud can assume to invoke the Lambda
+            function
           </span>
         </>
       }
diff --git a/libs/features/overview-route/src/lib/RegisterDeployment/Form.tsx b/libs/features/overview-route/src/lib/RegisterDeployment/Form.tsx
index 3b91f69e..6af8be5f 100644
--- a/libs/features/overview-route/src/lib/RegisterDeployment/Form.tsx
+++ b/libs/features/overview-route/src/lib/RegisterDeployment/Form.tsx
@@ -95,7 +95,7 @@ export function RegistrationForm() {
               </ServiceDeploymentExplainer>
             </>
           }
-          description="Please provide the HTTP endpoint or Lambda ARN where your service is running:"
+          description="Please provide the HTTP endpoint or Lambda function version ARN where your service is running:"
         >
           <EndpointForm />
         </Container>
@@ -138,13 +138,13 @@ function EndpointForm() {
         type={isLambda ? 'text' : 'url'}
         {...(isLambda && {
           pattern:
-            '^arn:aws:lambda:[a-z0-9\\-]+:\\d+:function:[a-zA-Z0-9\\-_]+:\\d+$',
+            '^arn:aws:lambda:[a-z0-9\\-]+:\\d+:function:[a-zA-Z0-9\\-_]+:.+$',
         })}
         name="endpoint"
         className="[&_.error]:absolute [&_.error]:pt-1 [&_input:not([type=radio])]:absolute left-0 right-0 my-2 [&_input:not([type=radio])]:pr-[4.75rem]"
         placeholder={
           isLambda
-            ? 'arn:aws:lambda:{reg}:{acc}:function:{func}:{version}'
+            ? 'arn:aws:lambda:{region}:{account}:function:{function-name}:{version}'
             : 'http://localhost:9080'
         }
         label={isLambda ? 'Lambda ARN' : 'HTTP endpoint'}