Steps to reproduce:
1) have some notification with complex number of macro, tags,long trigger description.
2) while zabbix makes this message into alerts table, field parameters only 2000 characters long.
3) If this message based on JSON for example for sending it later with webhook. JSON structure get broken.
4) Notification don't work and it hard to debug as we don't know that zabbix truncate that message.

Expected:

• I would happy to have some message about this in zabbix server log in DebugLevel=3
  Like

Message (10K) was truncated as it exceed limit for alerts.param(column) 2000.

Ideally param field in alerts table shouldn't be less than trigger's description.