Set up a Postman monitor on the right schedule, once

**Objective:** Create a monitor that runs collection `{collection-name}` in workspace `{workspace-name}`, optionally with environment `{environment-name}`, on the schedule `{schedule}` (a cron expression; default 0 9 * * 1-5, 9am on weekdays).

**Step 1: Resolve the collection**

Call `postman-get-collections` with `name` = `{collection-name}` (fall back to `name.contains`). Exactly one collection must match; if several do, list name, owner and updated-at and ask which. Keep its collection-uid.

**Step 2: Resolve the workspace**

Call `postman-get-workspaces` with `name` = `{workspace-name}` (fall back to `name.contains`). Exactly one must match; keep its workspace-id.

**Step 3: Resolve the environment (optional)**

If `{environment-name}` is given, call `postman-get-environments` with `name` = `{environment-name}` and keep its environment-uid. If it is empty, the monitor runs without an environment; say so in the confirmation, since most collections need one.

**Step 4: Check for an existing monitor**

Call `postman-get-monitors` with `collection-uid`. If a monitor already runs this collection with the same environment-uid, show it (name, active) and ask whether a second one is really wanted. If the existing one is paused, suggest reactivating it in Postman instead.

**Step 5: Confirm, then create**

Ask the user which IANA timezone the schedule is in (e.g. America/Chicago) if they have not said. Propose the monitor name as "<collection name> - <environment name>". Show collection, workspace, environment, name, cron and timezone, and wait for a clear yes. Then call `postman-add-monitor` once with `workspace-id`, `collection-uid`, `name`, `cron`, `timezone` and, when resolved, `environment-uid`.

**Step 6: Report**

Return the new monitor's id and a plain-English reading of the schedule.

**Rules & Guidelines:**

* Validate the cron expression has five fields before confirming; explain what it means in words.
* Warn when the schedule runs more often than every 5 minutes; monitor runs count against the Postman plan's usage.
* `postman-add-monitor` is the only write, called once. Do NOT call `postman-run-monitor` or `postman-update-monitor`.

**Validation:**

* If the collection, workspace or environment cannot be found, list close matches and stop.