feat: Add tool annotations for improved LLM tool understanding (#34)

Add readOnlyHint and title annotations to all 18 tools to help LLMs
better understand tool behavior and make safer decisions.

Changes:
- Added readOnlyHint: true to all tools (all are read-only operations)
- Added human-readable title annotations to all tools

This improves tool safety metadata for MCP clients.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: triepod-ai <199543909+triepod-ai@users.noreply.github.com>

Author: bryankthompson