Return control to the agent developer by sending elicited information in an InvokeAgent response

Rather than sending the information that your agent has elicited from the user to a Lambda function for fulfillment, you can instead choose to return control to the agent developer by sending the information in the InvokeAgent response. You can configure return of control to the agent developer when creating or updating an action group. Through the API, you specify RETURN_CONTROL as the customControl value in the actionGroupExecutor object in a CreateAgentActionGroup or UpdateAgentActionGroup request. For more information, see Add an action group to your agent in Amazon Bedrock.

If you configure return of control for an action group, and if the agent determines that it should call an action in this action group, the API or function details elicited from the user will be returned in the invocationInputs field in the InvokeAgent response, alongside a unique invocationId. You can then do the following:

• Set up your application to invoke the API or function that you defined, provided the information returned in the invocationInputs.

• Send the results from your application's invocation in another InvokeAgent request, in the sessionState field, to provide context to the agent. You must use the same invocationId and actionGroup that were returned in the InvokeAgent response. This information can be used as context for further orchestration, sent to post-processing for the agent to format a response, or used directly in the agent's response to the user.

  Note

  If you include returnControlInvocationResults in the sessionState field, the inputText field will be ignored.

To learn how to configure return of control to the agent developer while creating the action group, see Add an action group to your agent in Amazon Bedrock.

Example for returning control to the agent developer

For example, you might have the following action groups:

• A PlanTrip action group with a suggestActivities action that helps your users find activities to do during a trip. The description for this action says This action suggests activities based on retrieved weather information.

• A WeatherAPIs action group with a getWeather action that helps your user get the weather for a specific location. The action's required parameters are location and date. The action group is configured to return control to the agent developer.

The following is a hypothetical sequence that might occur:

1. The user prompts your agent with the following query: What should I do today? This query is sent in the inputText field of an InvokeAgent request.

2. Your agent recognizes that the suggestActivities action should be invoked, but given the description, predicts that it should first invoke the getWeather action as context for helping to fulfill the suggestActivities action.

3. The agent knows that the current date is 2024-09-15, but needs the location of the user as a required parameter to get the weather. It reprompts the user with the question "Where are you located?"

4. The user responds Seattle.

5. The agent returns the parameters for getWeather in the following InvokeAgent response (select a tab to see examples for an action group defined with that method):

   Function details

   HTTP/1.1 200
   x-amzn-bedrock-agent-content-type: application/json
   x-amz-bedrock-agent-session-id: session0
   Content-type: application/json
    
   {
       "returnControl": {
           "invocationInputs": [{
               "functionInvocationInput": {
                   "actionGroup": "WeatherAPIs",
                   "function": "getWeather",
                   "parameters": [
                       {
                           "name": "location",
                           "type": "string",
                           "value": "seattle"
                       },
                       {
                           "name": "date",
                           "type": "string",
                           "value": "2024-09-15"
                       }
                   ]
               }
           }],
           "invocationId": "79e0feaa-c6f7-49bf-814d-b7c498505172"
       }
   }

   OpenAPI schema

   HTTP/1.1 200
   x-amzn-bedrock-agent-content-type: application/json
   x-amz-bedrock-agent-session-id: session0
   Content-type: application/json
   
   {
       "invocationInputs": [{
           "apiInvocationInput": {
               "actionGroup": "WeatherAPIs",
               "apiPath": "/get-weather",
               "httpMethod": "get",
               "parameters": [
                   {
                       "name": "location",
                       "type": "string",
                       "value": "seattle"
                   },
                   {
                       "name": "date",
                       "type": "string",
                       "value": "2024-09-15"
                   }
               ]
           }
       }],
       "invocationId": "337cb2f6-ec74-4b49-8141-00b8091498ad"
   }

6. Your application is configured to use these parameters to get the weather for seattle for the date 2024-09-15. The weather is determined to be rainy.

7. You send these results in the sessionState field of another InvokeAgent request, using the same invocationId, actionGroup, and function as the previous response. Select a tab to see examples for an action group defined with that method:

   Function details

   POST https://bedrock-agent-runtime.us-east-1.amazonaws.com/agents/AGENT12345/agentAliases/TSTALIASID/sessions/abb/text
               
   {
       "enableTrace": true,
       "sessionState": {
           "invocationId": "79e0feaa-c6f7-49bf-814d-b7c498505172",
           "returnControlInvocationResults": [{
               "functionResult": {
                   "actionGroup": "WeatherAPIs",
                   "function": "getWeather",
                   "responseBody": {
                       "TEXT": {
                           "body": "It's rainy in Seattle today."
                       }
                   }
               }
           }]
       }
   }

   OpenAPI schema

   POST https: //bedrock-agent-runtime.us-east-1.amazonaws.com/agents/AGENT12345/agentAliases/TSTALIASID/sessions/abb/text
    
   {
       "enableTrace": true,
       "sessionState": {
           "invocationId": "337cb2f6-ec74-4b49-8141-00b8091498ad",
           "returnControlInvocationResults": [{
               "apiResult": {
                   "actionGroup": "WeatherAPIs",
                   "httpMethod": "get",
                   "apiPath": "/get-weather",
                   "responseBody": {
                       "application/json": {
                           "body": "It's rainy in Seattle today."
                       }
                   }
               }
           }]
       }
   }

8. The agent predicts that it should call the suggestActivities action. It uses the context that it's rainy that day and suggests indoor, rather than outdoor, activities for the user in the response.