You can include Jenkins Environment variables (see link), or the following variables defined by this plugin:

Variable usage: ${VAR_NAME}

CRFL - new line

DEFAULT_SUMMARY - configured in the global configuration page

DEFAULT_DESCRIPTION - configured in the global configuration page

TEST_RESULT

TEST_NAME

TEST_FULL_NAME

TEST_STACK_TRACE

TEST_ERROR_DETAILS

TEST_DURATION

TEST_PACKAGE_NAME

TEST_PACKAGE_CLASS_METHOD_NAME

TEST_STDERR

TEST_STDOUT

TEST_OVERVIEW

TEST_AGE

TEST_PASS_COUNT

TEST_SKIPPED_COUNT

TEST_FAIL_SINCE

TEST_IS_REGRESSION - expands to true/false

BUILD_RESULT