diff --git a/src/MonitoringTools/Public/Get-SystemHealth.ps1 b/src/MonitoringTools/Public/Get-SystemHealth.ps1
index 9d709ec3..43f6549c 100644
--- a/src/MonitoringTools/Public/Get-SystemHealth.ps1
+++ b/src/MonitoringTools/Public/Get-SystemHealth.ps1
@@ -6,9 +6,11 @@ function Get-SystemHealth {
         Returns CPU usage, disk free space and recent event log summary.
         The combined snapshot is also written to the structured log.
     #>
-    [CmdletBinding(SupportsShouldProcess=$true)]
+[CmdletBinding(SupportsShouldProcess=$true)]
     param()
 
+    if (-not $PSCmdlet.ShouldProcess('system health')) { return }
+
     $computer = if ($env:COMPUTERNAME) { $env:COMPUTERNAME } else { $env:HOSTNAME }
     $timestamp = (Get-Date).ToString('o')
 
diff --git a/tests/MonitoringTools/Get-SystemHealth.Tests.ps1 b/tests/MonitoringTools/Get-SystemHealth.Tests.ps1
index 6bb91075..ec9ff9de 100644
--- a/tests/MonitoringTools/Get-SystemHealth.Tests.ps1
+++ b/tests/MonitoringTools/Get-SystemHealth.Tests.ps1
@@ -19,4 +19,16 @@ Describe 'Get-SystemHealth function' {
         $result.DiskInfo | Should -Be $disk
         $result.EventLogSummary | Should -Be $events
     }
+
+    Safe-It 'does not query health when -WhatIf specified' {
+        Mock Get-CPUUsage {} -ModuleName MonitoringTools
+        Mock Get-DiskSpaceInfo {} -ModuleName MonitoringTools
+        Mock Get-EventLogSummary {} -ModuleName MonitoringTools
+
+        Get-SystemHealth -WhatIf
+
+        Assert-MockCalled Get-CPUUsage -Times 0 -ModuleName MonitoringTools
+        Assert-MockCalled Get-DiskSpaceInfo -Times 0 -ModuleName MonitoringTools
+        Assert-MockCalled Get-EventLogSummary -Times 0 -ModuleName MonitoringTools
+    }
 }