minor tweaks

Author: ramsrib

fern/calls/voicemail-detection.mdx

@@ -26,7 +26,7 @@ You can choose between several detection methods — but not all are created equ
 | **Google** | Very good accuracy, reliable | Slightly longer detection time than Vapi | ✅ Recommended |
 | **OpenAI** | High accuracy, flexible phrasing | Higher cost | ✅ Good option if budget allows |
 | **Twilio** (legacy) | Very fast machine beep detection | Prone to false positives | ⚠️ Use only in special cases |
-| **Vapi Voicemail Tool** (legacy) | Keyword-based detection in transcription | Slow, context-dependent | ⚠️ Use only if needed |
+| **[Vapi Voicemail Tool](/tools/voicemail-tool)** (beta) | Assistant-driven voicemail decisions | Most cost effective, requires good prompting | ✅ Best for customization and cost efficiency |
 
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@@ -595,3 +595,7 @@ When voicemail detection is disabled, your assistant will continue the conversat
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 By using Vapi's detection system, you'll avoid the common pitfalls of voicemail detection, while creating a **faster, smarter, and more professional experience** for your users.
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+## **Related Documentation**
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+- **[Voicemail Tool](/tools/voicemail-tool)** - Alternative assistant-controlled voicemail approach for maximum flexibility