AI freshness April: update evaluation and tokenizer docs

[Copilot]

Six stale .NET AI documentation articles refreshed for April with date updates, a tool install command fix, and Microsoft Style Guide improvements.

Key content fix

evaluate-with-reporting.md: The dotnet tool install --local command is replaced with --create-manifest-if-needed (available since .NET 8, auto-creates a manifest if none exists). The manual manifest TIP is removed since it's no longer necessary.

-dotnet tool install --local Microsoft.Extensions.AI.Evaluation.Console
+dotnet tool install --create-manifest-if-needed Microsoft.Extensions.AI.Evaluation.Console

Style improvements across all 6 files

• ms.date updated to 04/09/2026 in all files
• Passive voice → active voice throughout
• Weak instruction language (you should, you can, you need to) → imperative mood
• Causal since → because; additional → more/another
• Typo fixes (the the, with the all the data)
• evaluate-safety.md retains --prerelease — Microsoft.Extensions.AI.Evaluation.Safety is still preview-only

Files changed

• docs/ai/evaluation/libraries.md
• docs/ai/how-to/use-tokenizers.md
• docs/ai/evaluation/evaluate-with-reporting.md
• docs/ai/evaluation/evaluate-ai-response.md
• docs/ai/evaluation/responsible-ai.md
• docs/ai/evaluation/evaluate-safety.md

---

Internal previews

📄 File	🔗 Preview link
docs/ai/evaluation/evaluate-ai-response.md	Quickstart: Evaluate response quality
docs/ai/evaluation/evaluate-safety.md	Tutorial: Evaluate response safety with caching and reporting
docs/ai/evaluation/evaluate-with-reporting.md	Tutorial - Evaluate response quality with caching and reporting
docs/ai/evaluation/libraries.md	The Microsoft.Extensions.AI.Evaluation libraries
docs/ai/evaluation/responsible-ai.md	docs/ai/evaluation/responsible-ai
docs/ai/how-to/use-tokenizers.md	Use Microsoft.ML.Tokenizers for text tokenization

[Copilot]

Pull request overview

Refreshes six .NET AI documentation articles for April by updating dates, improving instructional style, and correcting guidance for installing the evaluation console tool.

Changes:

• Updated ms.date to 04/09/2026 across the refreshed articles.
• Revised wording to favor active voice and clearer, more direct instructions.
• Updated the dotnet tool install command in the reporting tutorial to use --create-manifest-if-needed and removed the now-unnecessary manifest tip.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
docs/ai/evaluation/libraries.md	Refresh date and tighten wording in evaluation library overview.
docs/ai/how-to/use-tokenizers.md	Refresh date and improve clarity/voice in tokenizer how-to.
docs/ai/evaluation/evaluate-with-reporting.md	Refresh date, improve tutorial phrasing, and update local tool install guidance.
docs/ai/evaluation/evaluate-ai-response.md	Refresh date and minor wording updates in quickstart.
docs/ai/evaluation/responsible-ai.md	Refresh date and simplify intro/description phrasing.
docs/ai/evaluation/evaluate-safety.md	Refresh date and improve clarity in safety evaluation tutorial.

[BillWagner]

This LGTM. Let's