You are helping me build the following AI agent workflow.

## Goal
Summarize Calls And Notify Teams: Receives call transcriptions via webhook, summarizes them with AI, syncs to HubSpot, and alerts teams via Slack, WhatsApp, or email.

## Specification
- What it does: Get clear summaries of every call with extracted action items and client details instantly routed to the right departments via email. You gain full CRM visibility in HubSpot while your team receives immediate alerts on Slack or WhatsApp to stay aligned without manual follow-up.
- Trigger: Triggered by an event (Event · on webhook transcription)
- Autonomy: Fully hands-off
- Expected setup effort: about an afternoon
- Tools/services involved:
  - Webhook: Receive call transcription trigger
  - OpenAI Chat Model: Summarize text and extract key info
  - HubSpot: Save summary to contact or deal record
  - Slack: Send instant alerts to teams
  - WhatsApp Business Cloud: Send multi-channel notifications

## Known pitfalls, handle each one explicitly in your implementation
1. Transcription services often include filler words or background noise artifacts so instruct the LLM to ignore non-speech elements during summarization.
2. WhatsApp Business Cloud requires a verified template message for initial user interactions so pre-approve notification templates in the Meta Developer Portal before deployment.
3. PII data like credit card numbers may appear in call transcripts so add a preprocessing step to redact sensitive information before sending data to external LLM APIs.

## Reference implementation
https://n8n.io/workflows/4641 (workflow template)
Fetch and inspect this before building. If it matches my stack, adapt it;
if not, rebuild the pattern with my tools.

## Process requirements
1. Before building: ask me which of the listed tools I actually use and
   what my platform is (n8n / Make / code / other). Do not assume.
2. Adapt the pattern to my answers; do not force the reference stack.
3. Address every pitfall above; tell me how you handled each.
4. Provide a test plan I can run before letting this touch real data.
5. Ask before any step that sends messages, modifies data, or spends money.

Source: https://usecasesforagents.com/use-case/summarize-calls-and-notify-teams/ via usecasesforagents.com