- This PR was started from [PR 1606: Tool
Guardrails](https://github.com/openai/openai-agents-python/pull/1606)
- It adds input and output guardrails at the tool level which can
trigger `ToolInputGuardrailTripwireTriggered` and
`ToolOutputGuardrailTripwireTriggered` exceptions
- It includes updated documentation, a runnable example, and unit tests
- `make check` and unit tests all pass
## Edits since last review:
- Extracted nested tool running logic in `_run_impl.py`
- Added rejecting tool call or tool call output and returning a message
to the model (rather than only raising an exception)
- Added the tool guardrail results to the `RunResult`
- Removed docs
steven10a
22a63aad8b