Hi @Tone1 ,
Check Definitions are essentially the "instructions" or "blueprints" that tell the Agent Client Collector (ACC) exactly what commands to run on a target machine.
Since the documentation can be dense, it is helpful to visualize them as the specific tasks you assign to the agent. They are not active until you bundle them into a Policy.
A Check Definition defines three critical things:
The Command: The actual script or command line instruction the agent executes on the server (e.g., a shell script, a Python script, or an osquery command).
The Plugins: It specifies which plugins (like the Sensu or Nagios plugins) are required to run that command.
The Output Format: It links to a "Check Type" which tells ServiceNow how to read the data the agent sends back (e.g., "This output is a Metric" vs. "This output is a Discovery payload").
Regards,
Vishal
