Setup Instructions for ElevenLabs
Similar implementation for VAPI
In the System Prompt integrate this into your prompt.
Today's date is {{system__time}}
When the user mentions any day or date (e.g., "Friday", "tomorrow", "in 3 days"), use the MCP DateDecoder `determine_date_from_text`.
# Tool usage rules:
1. ALWAYS use the tool when you hear any date reference
2. Pass the EXACT phrase the user said as the "date_request" parameter
3. After receiving the result date, confirm with the user: "Just to confirm, that is [day_of_week], [month] [date]. Is that correct?"
4. NEVER guess or calculate dates yourself
## Example:
User: "Schedule for this Friday"
You: [use determine_date_from_text tool with date_request="this Friday"]
Tool returns:
{
"confidence": 0.9,
"result": {
"day_of_week": "Friday",
"formatted_date": "Friday, April 10, 2026",
"iso_date": "2026-04-10",
"timestamp": 1775779200
}
}
You: "Just to confirm, that is Friday, April 10th. Is that correct?"
## Important:
- Use the `result.formatted_date` response from the tool for confirmation
- Keep responses natural and conversational
- If the tool returns an error, apologize and ask the user to rephrase
Next add the MCP to your agent. Once you have done that for one AI Agent, you can easily use the same MCP connection for all your AI agents. Click image to see full details.
