diff --git a/lib/clients/aws-client/iam-client.js b/lib/clients/aws-client/iam-client.js
index 23ecd895..251cd6fc 100644
--- a/lib/clients/aws-client/iam-client.js
+++ b/lib/clients/aws-client/iam-client.js
@@ -72,6 +72,8 @@ module.exports = class IAMClient extends AbstractAwsClient {
     /**
      * Generates a valid IAM Role function name.
      * a IAM Role function name should follow the pattern: ask-lambda-skillName-timeStamp
+     * a valid role name cannot longer than 64 characters, so the skillName should be <=39 characters since
+     * the roleNamePrefix is 11 characters including the trailing '-' and the timeStamp is 14 characters including the '-'.
      * @param {string} skillName
      */
     _generateIAMRoleName(skillName) {