POCO-based options follow-ups

[Alan Zimmer (alzimmermsft)]

What does this PR do?

Few small follow-ups after the migration to POCO-based options to remove a few unused parameters that were missed and fixing a description on one parameter.

GitHub issue number?

[Link to the GitHub issue this PR addresses]

Pre-merge Checklist

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  • Read contribution guidelines
  • PR title clearly describes the change
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  • Added comprehensive tests for new/modified functionality
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  • Updated servers/Azure.Mcp.Server/README.md and/or servers/Fabric.Mcp.Server/README.md documentation
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  • For new or modified tool descriptions, ran ToolDescriptionEvaluator and obtained a score of 0.4 or more and a top 3 ranking for all related test prompts
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• Extra steps for Azure MCP Server tool changes:
  • Updated command list in servers/Azure.Mcp.Server/docs/azmcp-commands.md
  • Ran ./eng/scripts/Update-AzCommandsMetadata.ps1 to update tool metadata in azmcp-commands.md (required for CI)
  • Updated test prompts in servers/Azure.Mcp.Server/docs/e2eTestPrompts.md
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[Copilot]

Pull request overview

Follow-up cleanup after the POCO-based options migration, primarily removing unused option constants/properties and correcting an option description to better match the current option surface.

Changes:

• Removed unused option names/properties across several toolsets (SreAgent, Insights, FoundryExtensions, Deploy, ACR).
• Sealed IoTHubGetOptions to prevent inheritance.
• Corrected Azure Backup’s Location option description constant usage and removed the now-unused LocationName constant.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tools/Azure.Mcp.Tools.SreAgent/src/Options/SreAgentOptionDefinitions.cs	Removes an unused option name constant.
tools/Azure.Mcp.Tools.IoTHub/src/Options/IoTHub/IoTHubGetOptions.cs	Marks the options type as sealed.
tools/Azure.Mcp.Tools.Insights/src/Options/InsightsGetOptions.cs	Removes unused AuthMethod option and related using.
tools/Azure.Mcp.Tools.FoundryExtensions/src/Options/Models/ResourceGetOptions.cs	Removes unused AuthMethod option and related using.
tools/Azure.Mcp.Tools.Deploy/src/Options/Plan/GetOptions.cs	Removes an unused WorkspaceFolder option (but leaves a now-misleading description on ProjectName).
tools/Azure.Mcp.Tools.AzureBackup/src/Options/Backup/BackupStatusOptions.cs	Updates Location option description constant reference.
tools/Azure.Mcp.Tools.AzureBackup/src/Options/AzureBackupOptionDefinitions.cs	Removes unused LocationName constant and standardizes on Location.
tools/Azure.Mcp.Tools.Acr/src/Options/Registry/RegistryListOptions.cs	Removes unused Registry option from list options (registry name belongs on repository-list).