[aaronpowell]

Pull Request Checklist

• I have read and followed the CONTRIBUTING.md guidelines.
• I have read and followed the Guidance for submissions involving paid services.
• My contribution adds a new instruction, prompt, agent, skill, workflow, or canvas extension file in the correct directory.
• The file follows the required naming convention.
• The content is clearly structured and follows the example format.
• I have tested my instructions, prompt, agent, skill, workflow, or canvas extension with GitHub Copilot.
• I have run npm start and verified that README.md is up to date.
• I am targeting the main branch for this pull request.

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Description

The website build exposed by #6269 fails during metadata generation with TypeError: tools.forEach is not a function. The new agent uses tools: new-relic-mcp-server/*, a string declaration explicitly supported by the custom agent configuration reference, but the generator assumes an array.

Normalize scalar and comma-separated tool strings into arrays before generating agent metadata and filter facets, while preserving existing list declarations. Invalid types now fail with the source filename. Add focused regression coverage and document the supported formats. No CI workflow change is needed.

Relates to #6269.

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Type of Contribution

• New instruction file.
• New prompt file.
• New agent file.
• New plugin.
• New skill file.
• New agentic workflow.
• New canvas extension.
• Update to existing instruction, prompt, agent, plugin, skill, workflow, or canvas extension.
• Other (please specify): Website metadata generator bug fix.

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Additional Notes

Original failure: website preview build, step 7. Astro never started; the failure was in website:data.

Validation:

• node --test eng\generate-website-data.test.mjs eng\yaml-parser.test.mjs - passed, 24 tests covering string/list tools, comma separation, missing/empty values, invalid types, and existing YAML parsing behavior.
• npm run website:build - passed, 1,600 pages built.
• npm start - passed; no generated README or marketplace changes.
• bash eng/fix-line-endings.sh - passed.
• git diff --check - passed before committing.

Resource-authoring and paid-service checklist items are not applicable to this infrastructure fix.

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By submitting this pull request, I confirm that my contribution abides by the Code of Conduct and will be licensed under the MIT License.

[github-actions]

🚦 Submission status: 👀 Ready for review

Risk tier: merge-risk:high — Privileged execution, automation, or review-policy change
Required to merge: passing submission-gate checks plus 1 approval from reviewers with write access, including a maintainer with admin or maintain permission.

Why this tier

• eng/generate-website-data.mjs is a high-risk path (automation, scripts, MCP config, hooks, or review policy)
• eng/generate-website-data.test.mjs is a high-risk path (automation, scripts, MCP config, hooks, or review policy)

Automated checks

Check	Status	Details
Line endings	✅ Passed	Passed · logs
Spelling	✅ Passed	Passed · logs
Contributor reputation	✅ Passed	Passed · logs
Duplicate resource scan	⏳ Pending (advisory, non-blocking)	Running · logs
PR quality signal	⏳ Pending (advisory, non-blocking)	Running · logs

Review

• Approvals: 0/1
• Assigned reviewer: not assigned yet — comment /request-review to ask for one
• Review target date: not set
• Still needed: 1 more approval(s); an approval from a maintainer with admin or maintain permission
• The core-maintainers pool is not staffed yet; an approver with admin or maintain permission is required instead.

Commands

Command	Who	What it does
/rerun-checks	PR author, maintainers	Re-runs failed or incomplete checks and re-evaluates this gate
/request-review	PR author, maintainers	Asks the review rotation to assign a reviewer (adds needs-reviewer)

_{Updated for 43d689b · gate run · This comment is maintained automatically — see submission gate docs.}

[github-actions]

🟡 Contributor Reputation Check: MEDIUM risk

Check	Risk
Profile	MEDIUM
Credential audit	NONE

Maintainers: please review this contributor before merging.
See the workflow run for full details.
Automated check powered by AGT.

[Copilot]

🟢 Approval recommended

No active review issues block approval of the tool-metadata normalization change.

No open issues 🎉

What changed in this PR

Fixes website metadata generation for string-valued agent tools, addressing the build failure exposed by #6269 while preserving existing YAML list support.

Changes:

• Normalize scalar and comma-separated tool strings into arrays; report invalid types with the source filename.
• Add regression tests for supported formats, empty values, invalid types, and tool filter facets.
• Document supported formats and the focused test command.

File	Description
website/​README.md	Documents supported tool declarations and regression tests.
eng/​generate-website-data.test.mjs	Tests tool normalization, filter facets, and validation errors.
eng/​generate-website-data.mjs	Normalizes and validates tools; enables isolated testing without running the full generator on import.

_{Review effort: Balanced (auto)}