Simplify tool instruction suffixes across addon builders

[plusplusoneplusplus]

Summary

This PR streamlines the instruction text for various tool addons by removing verbose explanations and condensing them into more concise, direct guidance. The changes reduce token usage while maintaining the essential information needed for tool usage.

Key Changes

• Search Conversations Addon: Condensed multi-line instructions into a single, more concise description of the two conversation-history tools and when to use them
• Create Work Item Addon: Removed the entire suffix instruction text (set to empty string), eliminating verbose guidance about work item creation workflows and skill invocation
• Loop Tools Addon: Simplified instructions for loop management tools, removing redundant explanations while keeping core guidance about interval-based task patterns
• Memory Read Tools Addon: Shortened instructions for memory search and retrieval, removing unnecessary context about when to use these tools
• Excalidraw Tools Addon: Removed the suffix instruction text (set to empty string), eliminating guidance about diagram creation and link sharing

Implementation Details

• All changes maintain the core functionality and tool availability
• Instructions are now more concise and direct, reducing prompt token overhead
• Two addons (Create Work Item and Excalidraw) now use empty string suffixes instead of verbose explanations
• The remaining addons preserve essential guidance in a more compact format

https://claude.ai/code/session_017TqpxETPzScRSdSCFh7js6