Implement a tool

PyCFX-MCP keeps the public tool surface compact. When you add or change a tool, start with backend behavior and expose only the smallest stable contract that MCP clients need.

Recommended steps

1. Add or update backend behavior in the src/ansys/cfx/mcp/cfx directory.

2. Return typed, JSON-friendly data from shared models when possible.

3. Register the public tool in the CFX MCP surface.

4. Add or update tests in the tests directory.

5. Document the behavior in the User guide or API reference section.

Make sure tests cover the typed response shape and the error path. If your tool requires a live CFX product session, mark the test as an integration test and keep a unit-level test for argument validation or dispatch behavior.