diff --git a/.github/actions/commenting/expectations/v1/Parameters.psd1 b/.github/actions/commenting/expectations/v1/Parameters.psd1
index c9767d9daf06..1e808a3c84a2 100644
--- a/.github/actions/commenting/expectations/v1/Parameters.psd1
+++ b/.github/actions/commenting/expectations/v1/Parameters.psd1
@@ -1,7 +1,7 @@
 @{
     Parameters = @(
       @{
-        Name = 'Repository'
+        Name = 'repository'
         Type = 'string'
         IfNullOrEmpty = {
           param($ErrorTarget)
@@ -31,7 +31,7 @@
       }
 
       @{
-        Name = 'Message_Body'
+        Name = 'message_body'
         Type = 'String'
         IfNullOrEmpty = {
           param($ErrorTarget)
@@ -75,7 +75,7 @@
       }
 
       @{
-        Name = 'Message_Path'
+        Name = 'message_path'
         Type = 'String'
         IfNullOrEmpty = {
           param($ErrorTarget)
diff --git a/.github/actions/reporting/stale-content/v1/Parameters.psd1 b/.github/actions/reporting/stale-content/v1/Parameters.psd1
index 56a419e1b539..de2302d0706c 100644
--- a/.github/actions/reporting/stale-content/v1/Parameters.psd1
+++ b/.github/actions/reporting/stale-content/v1/Parameters.psd1
@@ -1,7 +1,7 @@
 @{
   Parameters = @(
     @{
-      Name = 'Relative_Folder_Path'
+      Name = 'relative_folder_path'
       Type = 'String[]'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -33,7 +33,7 @@
     }
 
     @{
-      Name = 'Exclude_Folder_Segment'
+      Name = 'exclude_folder_segment'
       Type = 'String[]'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -56,7 +56,7 @@
     }
 
     @{
-      Name = 'Days_Until_Stale'
+      Name = 'days_until_stale'
       Type = 'Int'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -91,7 +91,7 @@
     }
 
     @{
-      Name = 'Stale_Since_Date'
+      Name = 'stale_since_date'
       Type = 'DateTime'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -125,7 +125,7 @@
     }
 
     @{
-      Name = 'Upload_Artifact'
+      Name = 'upload_artifact'
       Type = 'Bool'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -166,7 +166,7 @@
     }
 
     @{
-      Name = 'Export_As_Csv'
+      Name = 'export_as_csv'
       Type = 'Bool'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -206,7 +206,7 @@
     }
 
     @{
-      Name = 'Export_Path'
+      Name = 'export_path'
       Type = 'string'
       IfNullOrEmpty = {
         param($ErrorTarget)
diff --git a/.github/actions/reporting/versioned-content/v1/Parameters.psd1 b/.github/actions/reporting/versioned-content/v1/Parameters.psd1
index c27427eb3720..e2789ccd31a7 100644
--- a/.github/actions/reporting/versioned-content/v1/Parameters.psd1
+++ b/.github/actions/reporting/versioned-content/v1/Parameters.psd1
@@ -1,7 +1,7 @@
 @{
   Parameters = @(
     @{
-      Name = 'Repository'
+      Name = 'repository'
       Type = 'String'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -31,7 +31,7 @@
     }
 
     @{
-      Name = 'Number'
+      Name = 'number'
       Type = 'Int'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -61,7 +61,7 @@
     }
 
     @{
-      Name = 'Include_Path_Pattern'
+      Name = 'include_path_pattern'
       Type = 'String[]'
       IfNullOrEmpty = {
         # It's okay if this parameter is not specified.
@@ -84,7 +84,7 @@
       }
     }
     @{
-      Name = 'Exclude_Path_Pattern'
+      Name = 'exclude_path_pattern'
       Type = 'String[]'
       IfNullOrEmpty = {
         # It's okay if this parameter is not specified.
diff --git a/.github/actions/verification/authorization/v1/Parameters.psd1 b/.github/actions/verification/authorization/v1/Parameters.psd1
index 306e47874109..d849a1a8b74a 100644
--- a/.github/actions/verification/authorization/v1/Parameters.psd1
+++ b/.github/actions/verification/authorization/v1/Parameters.psd1
@@ -1,7 +1,7 @@
 @{
   Parameters = @(
     @{
-      Name = 'Repository'
+      Name = 'repository'
       Type = 'string'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -30,17 +30,15 @@
       }
     }
     @{
-      Name = 'AuthorizedAccounts'
+      Name = 'authorized_accounts'
       Type = 'String[]'
-      IfNullOrEmpty = {
-          param($ErrorTarget)
-
-          # This parameter is optional, so don't error.
-      }
       Process = {
         param($Parameters, $Value, $ErrorTarget)
 
-        [string[]]$SpecifiedAccounts = $Value -split ','
+        [string[]]$SpecifiedAccounts = $Value -split ',' | Where-Object {
+           -not [string]::IsNullOrEmpty($_)
+        }
+
         if ($SpecifiedAccounts.Count -gt 0) {
           $Parameters.AuthorizedAccounts = $SpecifiedAccounts
           Write-HostParameter -Name AuthorizedAccounts -Value $Parameters.AuthorizedAccounts
@@ -50,7 +48,7 @@
     }
 
     @{
-      Name = 'Permissions'
+      Name = 'permissions'
       Type = 'String[]'
       IfNullOrEmpty = {
           param($ErrorTarget)
@@ -118,7 +116,7 @@
     }
 
     @{
-      Name = 'Target'
+      Name = 'target'
       Type = 'String[]'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -191,7 +189,7 @@
     }
 
     @{
-      Name = 'User'
+      Name = 'user'
       Type = 'String'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -222,4 +220,4 @@
       }
     }
   )
-}
\ No newline at end of file
+}
diff --git a/.github/actions/verification/checklist/v1/Parameters.psd1 b/.github/actions/verification/checklist/v1/Parameters.psd1
index 237bf4803b0f..8e567b2bf266 100644
--- a/.github/actions/verification/checklist/v1/Parameters.psd1
+++ b/.github/actions/verification/checklist/v1/Parameters.psd1
@@ -1,7 +1,7 @@
 @{
   Parameters = @(
     @{
-      Name = 'Body'
+      Name = 'body'
       Type = 'string'
       IfNullOrEmpty = {
         param($ErrorTarget)
@@ -30,7 +30,7 @@
     }
 
     @{
-      Name          = 'Reference_Url'
+      Name          = 'reference_url'
       Type          = 'string'
       IfNullOrEmpty = {
         param($ErrorTarget)