diff --git a/src/Helper/Resolve-Dependency.ps1 b/src/Helper/Resolve-Dependency.ps1
index c3bb794..9d76571 100644
--- a/src/Helper/Resolve-Dependency.ps1
+++ b/src/Helper/Resolve-Dependency.ps1
@@ -1,4 +1,52 @@
 function Resolve-Dependency {
+    <#
+    .SYNOPSIS
+        Tests defined optional dependencies and returns the result as bool.
+
+    .DESCRIPTION
+        Use this function to test for optional modules. You can use it if you provide functions which needs special
+        modules but you don't want to make them required.
+
+        Place a file called Dependency.json in your module root dir. The default format is:
+
+        {
+            "Version": 0.1,
+            "Mandatory": {},
+            "Optional": [
+                {
+                    "Name": "VMware",
+                    "Modules": [
+                        "VMware.VimAutomation.Core"
+                    ]
+                },
+                {
+                    "Name": "CiscoUCS",
+                    "Modules": []
+                }
+            ]
+        }
+
+    .PARAMETER Name
+        Select the dependency item name you defined in the dependency.json.
+    .INPUTS
+        [None]
+
+    .OUTPUTS
+        [bool]
+
+    .EXAMPLE
+        If (-not (Resolve-Dependency -Name 'VMware')) {
+            Write-Error -Message ("Could not resolve the optional dependencies defined for {0}" -f 'VMware') -ErrorAction 'Stop'
+        }
+
+    .NOTES
+        File Name   : ResolveDependency.ps1
+        Author      : Marco Blessing - marco.blessing@googlemail.com
+        Requires    :
+
+    .LINK
+        https://github.com/OCram85/PSCredentialStore
+    #>
     [OutputType([bool])]
     [CmdletBinding()]
     param (
diff --git a/src/Helper/Test-Module.ps1 b/src/Helper/Test-Module.ps1
index 174dd32..7f18f95 100644
--- a/src/Helper/Test-Module.ps1
+++ b/src/Helper/Test-Module.ps1
@@ -1,11 +1,10 @@
 function Test-Module {
     <#
     .SYNOPSIS
-        Internal helper to check optional dependencies.
+        Tests if the given module exists on the local system.
 
     .DESCRIPTION
-        Test-Dependency checks if the given module or pssnapin is available on the system. It returns a bool value
-        So it is possible to use this function in a if condition.
+        Tests if the given module is installed on the local system. It returns a bool value as result.
 
     .PARAMETER Name
         Define a item name you need to test