PR created: https://github.com/RoM4iK/tinker/pull/80 ## Summary Add new `list_comments` MCP tool to allow agents to read ticket comments. ## Changes - Added `list_comments` tool definition and handler to mcp_controller.rb - Added `list_comments` to allowed tools for all agent roles (orchestrator, worker, reviewer, planner) - Returns comments with full content, author, type, and timestamps