- Time Entries: Start/stop timers, create/update/delete entries, list with filters, aggregated reports
- Projects: List, create, update, delete projects with billable rates and estimates
- Clients: List, create, update clients
- Tags: List, create, update tags
- Tasks: List, create, update tasks with project assignment
- Users: Get current user profile with resolved member ID
- Auto member_id resolution: No need to manually configure member IDs
- Actionable error messages: Every error tells you what to do next
- MCP annotations: Read-only, destructive, and idempotent hints for all tools