Tweak general agent prompt #5573

Job	Run time
build-and-check	2m 35s
test-integration-packages/billing	1m 11s
test-integration-cli	39s
test-integration-web	48s
test-integration-common	43s
test-integration-packages/internal	1m 5s
test-integration-sdk	51s
test-packages/internal	50s
test-packages/billing	41s
test-.agents	38s
test-common	42s
test-web	43s
test-sdk	46s
test-packages/agent-runtime	1m 0s
test-integration-packages/agent-runtime	39s
test-cli	1m 19s
	15m 10s

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