#213 Register-IshRemoveMcpInstructions markdown should escape variables, Invoke request try catch error handling...Next is the problem of the availability of the built-in $ISHRemoteSessionStateIshSession... Later offer the instructions also as explicit must-read Resource as not all LLMs seem to interpret them, append the resource to error messages if possible , then tune the LLM instructions, then proper build that generates resourcesListJson at compile time, performance improvement and cleanup, and review all the tripple-slash help as described in Execution.md [PublishToPSGalleryAsPreview]

Author: ddemeyer

.vscode/mcp.json

@@ -6,7 +6,7 @@
             "args": [                
                 "-NoProfile",
                 "-Command",
-                "& { Start-IshRemoteMcpServer -CmdletsToRegister (((Get-Command -Module ISHRemote -ListImported -CommandType Cmdlet).Name) + \"Get-Help\") -LogFilePath \"C:\\GITHUB\\ISHRemote\\IshRemoteMcpServer.log\" }"
+                "& { Start-IshRemoteMcpServer -CmdletsToRegister (((Get-Command -Module ISHRemote -ListImported -CommandType Cmdlet).Name) + \"Get-Help\") -LogFilePath \"D:\\GITHUB\\ISHRemote\\IshRemoteMcpServer.log\" }"
             ]
         },
         "IshRemoteMcpServerDEBUG": {

Doc/TheExecution-ISHRemote-8.2.md

@@ -26,7 +26,7 @@ Main tasks are
             "args": [                
                 "-NoProfile",
                 "-Command",
-                "& { Start-IshRemoteMcpServer -CmdletsToRegister (Get-Command -Module ISHRemote -ListImported -CommandType Cmdlet).Name -LogFilePath \"C:\\GITHUB\\ISHRemote\\IshRemoteMcpServer.log\" }"
+                "& { Start-IshRemoteMcpServer -CmdletsToRegister (Get-Command -Module ISHRemote -ListImported -CommandType Cmdlet).Name -LogFilePath \"D:\\GITHUB\\ISHRemote\\IshRemoteMcpServer.log\" }"
             ]
         }
     }
@@ -55,7 +55,7 @@ Main tasks are
 
 ```powershell
 Install-PSResource -Name PSMCP -Repository PSGallery
-CD C:\GITHUB\ISHRemote\MCP
+CD D:\GITHUB\ISHRemote\MCP
 New-MCP -Path .\ISHRemoteMcpServer -ServerName 'ISHRemoteMcpServer'
 ```
 PSMCP `Register-MCPTool.ps1` does not implement 'description'. There is `Get-Help` that prefers .SYNOPSIS over .DESCRIPTION but eventually it puts the cmdlet name in the description for `tools/list` endpoint
@@ -97,11 +97,11 @@ Overall [PSMCP/Public at main · dfinke/PSMCP](https://github.com/dfinke/PSMCP/t
 
 Is 'inspect' required?
 
-Debugging for now from C:\Github\ISHREMOTE>Copy-Item -Path Source\ISHRemote\Trisoft.ISHRemote\Scripts -Destination Source\ISHRemote\Trisoft.ISHRemote\bin\Debug\ISHRemote\ -Force -Recurse; Import-Module C:\GITHUB\ISHRemote\Source\ISHRemote\Trisoft.ISHRemote\bin\Debug\ISHRemote\ISHRemote.psm1 -Force; start-ishremotemcpserver -ActivateWhileLoop $false
+Debugging for now from D:\GITHUB\ISHREMOTE>Copy-Item -Path Source\ISHRemote\Trisoft.ISHRemote\Scripts -Destination Source\ISHRemote\Trisoft.ISHRemote\bin\Debug\ISHRemote\ -Force -Recurse; Import-Module D:\GITHUB\ISHRemote\Source\ISHRemote\Trisoft.ISHRemote\bin\Debug\ISHRemote\ISHRemote.psm1 -Force; start-ishremotemcpserver -ActivateWhileLoop $false
 
 More debugging is: 
-    1. pwsh -NoProfile -Command "& { Copy-Item -Path "C:\GITHUB\ISHRemote\Source\ISHRemote\Trisoft.ISHRemote\Scripts" -Destination "C:\GITHUB\\ISHRemote\Source\ISHRemote\Trisoft.ISHRemote\bin\Debug\ISHRemote\" -Force -Recurse;Import-Module "C:\GITHUB\\ISHRemote\Source\ISHRemote\Trisoft.ISHRemote\bin\Debug\ISHRemote\ISHRemote.psm1" -Verbose -Debug -Force;Import-Module "C:\GITHUB\\ISHRemote\Source\ISHRemote\Trisoft.ISHRemote\bin\Debug\ISHRemote\net6.0\Trisoft.ISHRemote.dll" -Verbose -Debug -Force;Get-IshVersion;(Get-Command -Module ISHRemote -ListImported -CommandType Cmdlet).Name;(Get-Help New-IShSession).Description.Text;(Get-Help New-IShSession).Description;Start-IshRemoteMcpServer -CmdletsToRegister (Get-Command -Module ISHRemote -ListImported -CommandType Cmdlet).Name -ActivateWhileLoop 0 -LogFilePath "C:\GITHUB\ISHRemote\IshRemoteMcpServer.log" }"
-    2. pwsh -NoProfile -Command "& { $env:PSModulePath=$env:PSModulePath + \";\" +  \"C:\GITHUB\ISHRemote\Source\ISHRemote\Trisoft.ISHRemote\bin\Debug\ISHRemote\";Get-IshVersion;(Get-Command -Module ISHRemote -ListImported -CommandType Cmdlet).Name;(Get-Help New-IShSession).Description.Text;(Get-Help New-IShSession).Description;Start-IshRemoteMcpServer -CmdletsToRegister (Get-Command -Module ISHRemote -ListImported -CommandType Cmdlet).Name -ActivateWhileLoop 0 -LogFilePath "C:\GITHUB\ISHRemote\IshRemoteMcpServer.log" }"
+    1. pwsh -NoProfile -Command "& { Copy-Item -Path "D:\GITHUB\ISHRemote\Source\ISHRemote\Trisoft.ISHRemote\Scripts" -Destination "D:\GITHUB\\ISHRemote\Source\ISHRemote\Trisoft.ISHRemote\bin\Debug\ISHRemote\" -Force -Recurse;Import-Module "D:\GITHUB\\ISHRemote\Source\ISHRemote\Trisoft.ISHRemote\bin\Debug\ISHRemote\ISHRemote.psm1" -Verbose -Debug -Force;Import-Module "D:\GITHUB\\ISHRemote\Source\ISHRemote\Trisoft.ISHRemote\bin\Debug\ISHRemote\net6.0\Trisoft.ISHRemote.dll" -Verbose -Debug -Force;Get-IshVersion;(Get-Command -Module ISHRemote -ListImported -CommandType Cmdlet).Name;(Get-Help New-IShSession).Description.Text;(Get-Help New-IShSession).Description;Start-IshRemoteMcpServer -CmdletsToRegister (Get-Command -Module ISHRemote -ListImported -CommandType Cmdlet).Name -ActivateWhileLoop 0 -LogFilePath "D:\GITHUB\ISHRemote\IshRemoteMcpServer.log" }"
+    2. pwsh -NoProfile -Command "& { $env:PSModulePath=$env:PSModulePath + \";\" +  \"D:\GITHUB\ISHRemote\Source\ISHRemote\Trisoft.ISHRemote\bin\Debug\ISHRemote\";Get-IshVersion;(Get-Command -Module ISHRemote -ListImported -CommandType Cmdlet).Name;(Get-Help New-IShSession).Description.Text;(Get-Help New-IShSession).Description;Start-IshRemoteMcpServer -CmdletsToRegister (Get-Command -Module ISHRemote -ListImported -CommandType Cmdlet).Name -ActivateWhileLoop 0 -LogFilePath "D:\GITHUB\ISHRemote\IshRemoteMcpServer.log" }"
 
 
 

Source/ISHRemote/Trisoft.ISHRemote/Scripts/Public/Invoke-IshRemoteMcpHandleRequest.ps1

@@ -9,7 +9,7 @@ function Invoke-IshRemoteMcpHandleRequest {
     # Initialize Method
     if ($Request.method -eq "initialize") {
         # Static response for simplicity, adjust serverInfo as needed
-        $response = '{"jsonrpc":"2.0","id":' + ($Request.id | ConvertTo-Json -Depth 10 -Compress) + ',"result":{"protocolVersion":"0.3.0","capabilities":{"tools":{"listChanged":false}},"instructions":"' + $instructionsJson + '","serverInfo":{"name":"PowerShell MCP Server (Template)","version":"0.1.0"}}}'
+        $response = '{"jsonrpc":"2.0","id":' + ($Request.id | ConvertTo-Json -Depth 10 -Compress) + ',"result":{"protocolVersion":"0.3.0","capabilities":{"tools":{"listChanged":false}},"instructions":' + $instructionsJson + ',"serverInfo":{"name":"PowerShell MCP Server (Template)","version":"0.1.0"}}}'
         return $response
     }
 
@@ -45,8 +45,20 @@ function Invoke-IshRemoteMcpHandleRequest {
     if ($Request.method -eq "tools/call") {
         $toolName = $Request.params.name
         $targetArgs = $Request.params.arguments | ConvertTo-Json -Depth 10 | ConvertFrom-Json -Depth 10 -AsHashtable
-
-        $result = & $toolName @targetArgs
+        $result = $null
+        try {
+            $result = & $toolName @targetArgs
+        }
+        catch {
+            Write-IshRemoteLog -LogEntry @{
+                Level      = 'Error'
+                Message    = "Error invoking tool [$toolName]: $_"
+                RequestId  = $Request.id
+                Method     = $Request.method
+                ToolName   = $toolName
+                Arguments  = $targetArgs
+            }
+        }
 
         # Log structured data
         Write-IshRemoteLog -LogEntry @{

Source/ISHRemote/Trisoft.ISHRemote/Scripts/Public/Register-IshRemoteMcpInstructions.ps1

@@ -16,7 +16,7 @@ To execute these MCP Tools, so IShRemote cmdlets, you need to create a `IshSessi
 
 # Rules
 
-1. IShRemote PowerShell cmdlets can be recognized by their naming convention as the noun starts with `ISh`, so verb-`ISh`noun like `New-IShSession`. Most the cmdlets of IShRemote are made available as MCP Tools with the same or reduced parameter set - for example `-IshSession $ishSession` is superfluous and should be avoided.
+1. IShRemote PowerShell cmdlets can be recognized by their naming convention as the noun starts with `ISh`, so verb-`ISh`noun like `New-IShSession`. Most the cmdlets of IShRemote are made available as MCP Tools with the same or reduced parameter set - for example parameter `-IshSession` with value `$ishSession` is superfluous and should be avoided.
 2. Do not pass parameter `-IshSession` to any MCP Tool.
 3. Do not make up parameters for the cmdlets! Do not use and JSON parameters! Do note use hash table structures (`@{ Name = "FUSERNAME"; Value = ...}`) for ISHRemote cmdlets! All parameters should exist and can be verified over the MCP Tool description or by triggering standard PowerShell `Get-Help` cmdlet on it.
 4. Do not make up field names or imagine their field level! You must use `Get-IshTypeFieldDefinition` to understand the available field and object types, including custom fields. You can reuse the `Get-IshTypeFieldDefinition` result until a  `New-IShSession` was triggered to save tokens. Do not ask for `Continue` for this `Get-IshTypeFieldDefinition` MCP Tool.