Editorial improvements for #666

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Editorial Review

This PR contains structural improvements to documentation changed in #666.

Changes

• app/en/get-started/agent-frameworks/crewai/custom-auth-flow/page.mdx: Structure - Added intro line and reorganized first paragraph to follow 10/20/70 format; Terminology - Changed "Tool" to "tool" in heading
• app/en/get-started/agent-frameworks/crewai/use-arcade-tools/page.mdx: Voice and tone - Changed "Follow the step-by-step instructions below" to be more direct; Structure - Added introductory context about what readers will learn
• app/en/get-started/agent-frameworks/google-adk/overview/page.mdx: Voice and Tone (Avoid marketing language) - Removed "seamless" and "powerful"; Structure (Default Page Structure) - Restructured opening to follow 10/20/70 format
• app/en/get-started/agent-frameworks/google-adk/use-arcade-tools/page.mdx: Voice and Tone - Removed "let's" (avoid marketing language); Structure - Added proper intro paragraph following 10/20/70 format
• app/en/get-started/agent-frameworks/langchain/auth-langchain-tools/page.mdx: Voice and Tone - Removed "we'll show you", Structure - Reorganized intro paragraph to match 10/20/70 format

Context

These suggestions are based on our style guide and focus on document structure, not word-level fixes (which are handled by Vale).

Review each change carefully - accept what improves the docs, modify what needs adjustment, or close this PR if the changes aren't helpful.

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Project	Deployment	Review	Updated (UTC)
docs	Error		Jan 21, 2026 0:20am