While generating SBOMs for the Go agent via the cylconedx-gomod utility, with license detection, it emits a warning that the module doesn't include a license:

% cyclonedx-gomod mod \
           -output-version 1.4 \
           -licenses -assert-licenses -json -output "sbom.json"
3:29PM WRN no licenses detected [email protected]

The Go project have a general policy for how a license should be specified for a module, which should be followed to allow tools for reliable license detection. The policy can be found here.

Additionally, it seems that the agent module doesn't have a name, except a vendor string zabbix.com, which makes it ambiguous.