ToolUniverse Tool Creator

Create new scientific tools following established patterns.

Top 7 Mistakes (90% of Failures)

1. Missing default_config.py Entry — tools silently won't load
2. Non-nullable Mutually Exclusive Parameters — validation errors (#1 issue in 2026)
3. Fake test_examples — tests fail, agents get bad examples
4. Single-level Testing — misses registration bugs
5. Skipping test_new_tools.py — misses schema/API issues
6. Tool Names > 55 chars — breaks MCP compatibility
7. Raising Exceptions — should return error dicts instead

Two-Stage Architecture