Add ignore_args support for tool trajectory evaluation

[allenjoshua16]

Link to Issue or Description of Change

1. Link to an existing issue (if applicable):

• Closes: Add ignore_args option to tool trajectory evaluation #4794

2. Or, if no issue exists, describe the change:

Problem:

Tool trajectory evaluation currently compares both tool names and argument values when matching expected and actual tool calls.

This can cause valid evaluations to fail when tool arguments contain dynamic or non-deterministic values such as timestamps, generated queries, or other runtime-generated content.

Solution:

Added an ignore_args option to ToolTrajectoryCriterion.

When enabled, tool trajectory matching compares only tool names and ignores argument values. This behavior is supported across all existing match modes:

• EXACT
• IN_ORDER
• ANY_ORDER

Updated TrajectoryEvaluator to pass this configuration into the matching logic while preserving the existing behavior by default (ignore_args=False).

Added unit tests covering:

• ignore_args configuration loading
• matching behavior with different tool arguments
• existing matching behavior remaining unchanged

Testing Plan

Unit Tests:

• I have added or updated unit tests for my change.
• All unit tests pass locally.

Tested with:

pytest tests/unittests/evaluation/test_trajectory_evaluator.py -q

[rohityan]

Hi @allenjoshua16 , Thank you for your contribution! We appreciate you taking the time to submit this pull request. Can you please fix the failing mypy-diff tests before we can proceed with the review.

[allenjoshua16]

Thanks for the feedback. I've addressed the mypy-diff failure and pushed an additional commit to the PR.

The issue was caused by mypy reporting a no-any-return error in trajectory_evaluator.py. I updated the implementation to return an explicit bool value and verified that the trajectory evaluator tests still pass locally:

pytest tests/unittests/evaluation/test_trajectory_evaluator.py -q
# 35 passed

Please let me know if there are any other issues I should address.