Modify Bedrock Agent session state with Action groups
Having read through the documentation:
https://docs.aws.amazon.com/bedrock/latest/userguide/agents-lambda.html
In the beginning of section "Lambda response event to Amazon Bedrock" it is said that:
"Amazon Bedrock expects a response from your Lambda function that matches the following format. The response consists of parameters returned from the API operation. The agent can use the response from the Lambda function for further orchestration or to help it return a response to the customer." Below is an image of the response format:
This leads me to believe that all parameters defined in the below response format can be modified such that the Agent session state can be updated from an Action Group lambda function. More specifically, I would like to change the knowledgeBasesConfiguration inside the ActionGroup Lambda function, so that when the Agent performs a search query toward the associated knowledge base, it takes into consideration the new knowledgeBasesConfiguration in the now updated session state. However, following the response structure as provided in the link above does not seem to have any effect on this parameter. I tried modifying session attributes as well, which are returned in the response statement, but neither does this seem to be utilized by the Agent.
My question is then, is what I'm trying to achieve even possible? If the answer is yes, then what may I be doing incorrectly? If the answer is no, then why does the suggested response format look the way it does? What is even the point returning parameters such as sessionAttributes, promptSessionAttributes, knowledgeBasesConfiguration if they cannot be used by the Agent anyways?
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Based on the information available, it appears that modifying the session state, including the knowledgeBasesConfiguration, from within an Action Group Lambda function is not directly supported in the way you're attempting.
The response format you're referring to is indeed used for the Lambda function to communicate back to Amazon Bedrock, but it's primarily designed for returning the results of the action execution, not for modifying the agent's session state or configuration.
The sessionAttributes and promptSessionAttributes in the response are likely used for maintaining context within the conversation, but they don't directly modify the agent's configuration or how it interacts with knowledge bases.
As for the knowledgeBasesConfiguration in the response format, it's possible that this is used to provide information about the knowledge base used in the action, rather than to modify the agent's knowledge base configuration for future interactions.
If you need to modify the agent's behavior or configuration dynamically, you might need to explore other approaches:
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Use the session state attributes that are passed to the Lambda function to store and pass information that can influence the agent's behavior in subsequent turns.
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Consider using custom orchestration if you need more control over the agent's workflow and decision-making process.
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If you need to modify the agent's configuration more fundamentally, you might need to do this through the Amazon Bedrock API or console outside of the conversation flow.
It's worth noting that the exact behavior and capabilities of Amazon Bedrock Agents are still evolving, and the documentation might not always reflect the most up-to-date functionality. If this feature is critical for your use case, it would be advisable to contact AWS support for the most current information and potential workarounds.
Sources
Customize agent for your use case - Amazon Bedrock
Customize your Amazon Bedrock Agent's behavior with custom orchestration - Amazon Bedrock
SessionState - Amazon Bedrock
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