fix missing ToolRubric import

[ADharaUTEXAS123007]

Description

When I ran "wiki-search" example, it gave an error saying "verifiers has no attribute ToolRubric".
So, I created file verifiers/verifiers/rubrics/tool_rubric.py with ToolRubric class
Added the import .rubrics.tool_rubric import ToolRubric to init.py

Type of Change

• [ x ] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Test improvement

Testing

• [ x] All existing tests pass when running uv run pytest locally.
• New tests have been added to cover the changes

Checklist

• My code follows the style guidelines of this project as outlined in AGENTS.md
• [ x] I have performed a self-review of my own code
• [ x] I have commented my code, particularly in hard-to-understand areas
• [ x] I have made corresponding changes to the documentation
• [ x] My changes generate no new warnings
• [ x] Any dependent changes have been merged and published

Additional Notes

---

Note

Adds a rubric to evaluate tool usage and exposes it as part of the public API.

• New ToolRubric counts total tool calls and per-tool calls from assistant messages; initializes reward funcs dynamically from provided tools
• Exports ToolRubric in verifiers/__init__.py (runtime exports and TYPE_CHECKING) to fix verifiers has no attribute ToolRubric

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[cursor]

Per-tool counter uses attribute access on dictionary

High Severity

The get_tool_call_count_func method uses attribute access (hasattr(tool_call, "function") and tool_call.function.name) on tool_call items, but completion messages passed to rubric functions are dictionaries, not OpenAI response objects. Dictionary items don't have a function attribute, so hasattr returns False and per-tool counts are always 0. The existing ToolMonitorRubric in tool_env.py correctly uses dictionary access: tool_call.get("function", {}).get("name").

 

[mikasenghaas]

ToolRubric could deprecated in #653 and became the more general and internal MonitorToolRubric. check the most recent release notes for some more details on migration but the tldr is that you can just remove any usage of ToolRubric in your env implementation. any ToolEnv will automatically do the reporting that the rubric did before. for wiki-search specifically, the implementation on current main and the env hub should be up-to-date, maybe refresh your venv?