feat: add destructive hints, titles, and readonly hints to mcp tools

[jonathannorris]

This PR enhances all MCP tool definitions with proper annotations to improve AI assistant behavior and user experience.

Changes Made

• 🚨 Destructive Hints: Added destructiveHint: true to operations that can affect production environments (delete, update, enable/disable targeting)
• 📖 Human-Readable Titles: Added title annotations to all tools for better UI display (e.g., "List Feature Flags", "Create Variable")
• 👀 Read-Only Hints: Added readOnlyHint: true to all non-destructive operations (list, get, fetch)

Impact

• AI assistants will now properly warn users before executing destructive operations
• Tool names are more user-friendly in UI contexts
• Clear categorization between read-only and modifying operations
• Better safety guardrails for production environment changes

[JamieSinn]

Copilot caught one missing

[Copilot]

Pull Request Overview

This PR enhances MCP tool definitions by adding structured annotations to improve AI assistant behavior and user experience. The changes focus on adding safety guardrails and better UI display for tools that interact with DevCycle's feature flag management system.

• Added destructive hints to operations that can affect production environments
• Added human-readable titles to all tools for better UI display
• Added read-only hints to distinguish non-destructive operations

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/mcp/tools/variableTools.ts	Added annotations for variable management operations with appropriate destructive/read-only hints
src/mcp/tools/selfTargetingTools.ts	Enhanced self-targeting tools with titles and destructive hints for override clearing
src/mcp/tools/resultsTools.ts	Added read-only annotations to evaluation reporting tools
src/mcp/tools/projectTools.ts	Enhanced project management tools with appropriate annotations
src/mcp/tools/featureTools.ts	Comprehensive annotation updates for feature flag operations including targeting and variations
src/mcp/tools/environmentTools.ts	Added annotations to environment management tools
src/mcp/tools/customPropertiesTools.ts	Enhanced custom property tools with destructive hints for modify operations

[Copilot]

The warning message format is inconsistent with other tools. Other destructive operations use '⚠️ IMPORTANT:' while this uses '⚠️ WARNING:'. Consider using '⚠️ IMPORTANT:' for consistency.

Suggested change

	'Update an existing variation by key. ⚠️ WARNING: Updating a feature variation may affect production environments. Include dashboard link in the response.',
	'Update an existing variation by key. ⚠️ IMPORTANT: Updating a feature variation may affect production environments. Include dashboard link in the response.',