## Background
Currently, the `RunHooks` lifecycle (`on_tool_start`, `on_tool_end`)
exposes the `Tool` and `ToolContext`, but does not include the actual
arguments passed to the tool call.
resolves https://github.com/openai/openai-agents-python/issues/939
## Solution
This implementation is inspired by [PR
#1598](https://github.com/openai/openai-agents-python/pull/1598).
* Add a new `tool_arguments` field to `ToolContext` and populate it via
from_agent_context with tool_call.arguments.
* Update `lifecycle_example.py` to demonstrate tool_arguments in hooks
* Unlike the proposal in [PR
#253](https://github.com/openai/openai-agents-python/issues/253), this
solution is not expected to introduce breaking changes, making it easier
to adopt.
Wen-Tien Chang
5e1db14da5