diff --git a/changelogs/fragments/transit_gateway_doc_update.yaml b/changelogs/fragments/transit_gateway_doc_update.yaml
new file mode 100644
index 00000000..26925b17
--- /dev/null
+++ b/changelogs/fragments/transit_gateway_doc_update.yaml
@@ -0,0 +1,3 @@
+---
+trivial:
+- "Update the README of manage_transit_gateway role to match the argument specs."
diff --git a/roles/manage_transit_gateway/README.md b/roles/manage_transit_gateway/README.md
index c1673384..069a79f1 100644
--- a/roles/manage_transit_gateway/README.md
+++ b/roles/manage_transit_gateway/README.md
@@ -21,17 +21,21 @@ AWS User Account with the following permission:
 Role Variables
 --------------
 
-* **action**: Whether to create or delete the transit gateway. Choices: 'create', 'delete'.
-* **transit_gateway**: A dict of parameters needed to create transit gateway.
-    **asn**: A private Autonomous System Number (ASN) for the Amazon side of a BGP session.
-    **tags**: A dict of tags for the transit gateway.
-    **description**: Description for the transit gateway.
-* **vpc_attachment**: A list of dict of parameters to create vpc attachments.
-    **name**: Name for the VPC attachment.
-    **tags**: A dict of tags for the attachment.
-    **subnets**: A list of subnets to be added to the attachment.
-* **vpn_attachment**: A list of dict of parameters to create vpn attachments.
-    **customer_gateway_id**: Id of the customer gateway.
+* **action** (str): Whether to create or delete the transit gateway. Choices: 'create', 'delete'.
+* **transit_gateway** (dict): A dict of parameters needed to create transit gateway.
+    **asn** (int): A private Autonomous System Number (ASN) for the Amazon side of a BGP session.
+    **tags** (dict): A dict of tags for the transit gateway.
+    **description** (str): Description for the transit gateway.
+* **vpc_attachment** (list(dict)): A list of dict of parameters to create vpc attachments.
+    **name** (str): Name for the VPC attachment.
+    **tags** (dict): A dict of tags for the attachment.
+    **subnets** (list(str)): A list of subnets to be added to the attachment.
+* **vpn_attachment** list(dict): A list of dict of parameters to create vpn attachments.
+    **customer_gateway_id** (str): Id of the customer gateway.
+* **vpc_route_table** (list(dict)): Route table entries for the VPC.
+    **vpc_id** (str): VPC id for which the route should be added..
+    **cidr_block** (str): Destination CIDR block.
+    **tags** (dict): A dict of tags for the route table.
 
 Dependencies
 ------------
diff --git a/roles/manage_transit_gateway/meta/argument_specs.yaml b/roles/manage_transit_gateway/meta/argument_specs.yaml
index cc7e10b0..99e014f3 100644
--- a/roles/manage_transit_gateway/meta/argument_specs.yaml
+++ b/roles/manage_transit_gateway/meta/argument_specs.yaml
@@ -54,7 +54,7 @@ argument_specs:
         elements: dict
         options:
           vpc_id:
-            description: Te VPC id for which the route should be added.
+            description: The VPC id for which the route should be added.
             type: str
           cidr_block:
             description: Destination CIDR block.