chore: add missing expectations for accuracy tests

[himanshusinghs]

Proposed changes

A small change to bring back accuracy to previous known levels.

Checklist

• I have signed the MongoDB CLA

[Copilot]

Pull Request Overview

This PR updates accuracy tests to bring them back to previously known performance levels by adding missing expectations and improving test prompts.

• Adds missing verbosity parameter expectations in explain tool accuracy tests
• Improves the prompt clarity for collection index query testing

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
tests/accuracy/explain.test.ts	Adds missing verbosity: Matcher.string() expectations to three test cases
tests/accuracy/collectionIndexes.test.ts	Improves prompt wording from "Is the following query indexed?" to "Is there an index covering the following query?"

[coveralls]

Pull Request Test Coverage Report for Build 17914396130

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 82.33%

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Totals
Change from base Build 17911130906:	0.0%
Covered Lines:	5232
Relevant Lines:	6247

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💛 - Coveralls

[github-actions]

📊 Accuracy Test Results

📈 Summary

Metric	Value
Commit SHA	200425db350c40a67e92ba9d4555ab65ad11a9ae
Run ID	f16ec78a-166b-463b-91a3-926fa8057666
Status	done
Total Prompts Evaluated	61
Models Tested	1
Average Accuracy	97.1%
Responses with 0% Accuracy	1
Responses with 75% Accuracy	3
Responses with 100% Accuracy	57

📊 Baseline Comparison

Metric	Value
Baseline Commit	9f4c48b786d16093ae2936c2b8ddc270221eaaed
Baseline Run ID	ca24c181-d9a9-4669-9982-4cdc1df5939f
Baseline Run Status	done
Responses Improved	4
Responses Regressed	0

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📎 Download Full HTML Report - Look for the accuracy-test-summary artifact for detailed results.

Report generated on: 9/22/2025, 11:58:43 AM