Editorial improvements for #748

[github-actions]

Editorial Review

This PR contains structural improvements to documentation changed in #748.

Changes

• app/en/get-started/agent-frameworks/langchain/use-arcade-with-langchain-ts/page.mdx: Structure - Added intro line after title; changed "Next Steps" to "Next steps" (sentence case heading)
• app/en/get-started/agent-frameworks/mastra/page.mdx: Structural improvements
• app/en/get-started/agent-frameworks/vercelai/page.mdx: Structural improvements
• app/en/guides/tool-calling/custom-apps/get-tool-definitions/page.mdx: Structure - Added intro line and modified structure to follow 10/20/70 format; Terminology - Changed "MCP Server" to "MCP server" in headings and body text; Marketing language - Changed "seamless integration" to "integration" and "simplifies your code" to "improves your code"; Voice and tone - Changed "you can" to "use" for more direct language

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.

---

Generated by editorial review using Claude

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
docs	Error		Feb 11, 2026 7:02pm