docs: added explanation for SuggestionResult (#490)

* docs: added explanation for SuggestionResult

PiperOrigin-RevId: 435670355

Source-Link: googleapis/googleapis@5d85995

Source-Link: https://github.com/googleapis/googleapis-gen/commit/1b913e4484a66b3f4d01c55be174704272466264
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* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

google/cloud/dialogflow_v2/types/participant.py

@@ -360,11 +360,22 @@ class AnalyzeContentResponse(proto.Message):
             [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
             of
             [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
+
+            Note that any failure of Agent Assist features will not lead
+            to the overall failure of an AnalyzeContent API call.
+            Instead, the features will fail silently with the error
+            field set in the corresponding SuggestionResult.
         end_user_suggestion_results (Sequence[google.cloud.dialogflow_v2.types.SuggestionResult]):
             The suggestions for end user. The order is the same as
             [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs]
             of
             [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
+
+            Same as human_agent_suggestion_results, any failure of Agent
+            Assist features will not lead to the overall failure of an
+            AnalyzeContent API call. Instead, the features will fail
+            silently with the error field set in the corresponding
+            SuggestionResult.
         dtmf_parameters (google.cloud.dialogflow_v2.types.DtmfParameters):
             Indicates the parameters of DTMF.
     """