# Built-in tools
<a name="Built-in-tools"></a>

Use CloudWatch to gain visibility into how your agents use built-in tools like `Code interpreter tool` and `Browser use tool` to complete tasks. CloudWatch provides monitoring capabilities for each tool. For more information on Amazon Bedrock AgentCore built-in tools, see [Use Amazon Bedrock AgentCore built-in tools to interact with your applications ](https://docs.aws.amazon.com/bedrock-agentcore/latest/devguide/built-in-tools.html).

**Topics**
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## Code interpreter tool
](#Code-interpreter-tool)
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## Browser use tool
](#Browser-use-tool)

## Code interpreter tool
<a name="Code-interpreter-tool"></a>

You can use the code interpreter tool for the following:
+ Track code execution success rates, runtime duration, and resource consumption
+ Monitor memory usage and computational resource allocation
+ Analyze code execution patterns and optimization opportunities
+ Observe error rates and debugging information for failed executions
+ Track security sandbox isolation and compliance metrics

![\[Code interpreter tool view\]](http://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/images/Code_interpreter.png)

+ **Tools** – You can monitor fetch operations and API calls made through the browser tool. Choose a tool under **Name** to view the dashboard.

  Choose **View details** to view the resource details.  
![\[Code interpreter tool details\]](http://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/images/Built-in-tools-details.png)
  + **Started sessions** – Total number of code interpreter sessions initiated by agents. Each session represents a sandboxed environment where agents can execute code, analyze data, and generate outputs. Monitor this metric to track code interpreter usage and capacity planning
  + **Connections** – Number of active connections to code interpreter runtime environments. This includes both successful connections and connection attempts, helping track resource utilization and concurrent usage patterns
  + **Connection errors** – Count of failed connections to code interpreter environments due to system issues, resource constraints, or configuration problems. High connection error rates may indicate infrastructure issues requiring investigation
  + **Connection throttles** – Number of connection requests throttled due to exceeding allowed limits or resource constraints. Monitor this metric to identify when code interpreter usage approaches capacity limits and may require scaling
  + **CPU hours billed** – Total computational time consumed by code interpreter sessions, measured in CPU hours. This metric helps track resource costs and optimize code execution efficiency across agent workloads
  + **Memory hours billed** – Total memory consumption by code interpreter sessions over time, measured in memory hours. Use this metric for cost tracking and to identify memory-intensive code execution patterns that may need optimization
+ **Tool sessions** – View all the connected sessions where the tool was used.  
![\[Tool sessions view\]](http://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/images/Tool-sessions.png)

  Choose a **Session ID** under **Total sessions** to view the session dashboard.
+ **Traces** – View the sample traces for agents with observability enabled.  
![\[Traces view\]](http://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/images/Traces-view.png)

  Choose a **Trace ID** under **Traces** to view the trace details.

![\[Trace summary view\]](http://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/images/Trace-summary.png)


## Browser use tool
<a name="Browser-use-tool"></a>

You can use the browser use tool for the following:
+ Track browser navigation patterns, page load times, and interaction success rates
+ Observe browser session duration and resource utilization
+ Analyze fetch errors and troubleshoot browser automation issues
+ Observe browser session duration and resource utilization
+ Track security sandbox performance and isolation effectiveness

**Note**  
The **Tools**, **Tool sessions**, and **Traces** tab experience and fields are similar to **Code interpreter tool**. For more information on the fields, see [Code interpreter tool](#Code-interpreter-tool).