You are helping me build the following AI agent workflow.

## Goal
Manage Webinars In GoToWebinar: Creates a new GoToWebinar event, updates its description with your inputs, and returns the final details for confirmation.

## Specification
- What it does: Set up your next GoToWebinar instantly by creating an event, updating its description with your details, and receiving the confirmed information you need to proceed.
- Trigger: Run manually (Manual · on demand)
- Autonomy: Fully hands-off
- Expected setup effort: under an hour
- Tools/services involved:
  - GoToWebinar: Create, update, and retrieve webinar details

## Known pitfalls, handle each one explicitly in your implementation
1. GoToWebinar requires specific date formats like ISO 8601, so you must parse user inputs carefully before sending requests.
2. The update endpoint may fail if the webinar is already in progress, so add a status check before attempting modifications.
3. Missing required fields like timezone or registration settings will cause silent failures, so validate all inputs locally first.

## Reference implementation
https://n8n.io/workflows/960 (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/manage-webinars-in-gotowebinar/ via usecasesforagents.com