diff --git a/aws-distro-opentelemetry-node-autoinstrumentation/src/aws-attribute-keys.ts b/aws-distro-opentelemetry-node-autoinstrumentation/src/aws-attribute-keys.ts
index 54bd517a..fde4ae2a 100644
--- a/aws-distro-opentelemetry-node-autoinstrumentation/src/aws-attribute-keys.ts
+++ b/aws-distro-opentelemetry-node-autoinstrumentation/src/aws-attribute-keys.ts
@@ -4,7 +4,7 @@
 import { SEMATTRS_AWS_DYNAMODB_TABLE_NAMES } from '@opentelemetry/semantic-conventions';
 
 // Utility class holding attribute keys with special meaning to AWS components
-export const AWS_ATTRIBUTE_KEYS: { [key: string]: string } = {
+export const AWS_ATTRIBUTE_KEYS = {
   AWS_SPAN_KIND: 'aws.span.kind',
   AWS_LOCAL_SERVICE: 'aws.local.service',
   AWS_LOCAL_OPERATION: 'aws.local.operation',
@@ -45,4 +45,5 @@ export const AWS_ATTRIBUTE_KEYS: { [key: string]: string } = {
   AWS_LAMBDA_FUNCTION_NAME: 'aws.lambda.function.name',
   AWS_LAMBDA_RESOURCE_MAPPING_ID: 'aws.lambda.resource_mapping.id',
   AWS_LAMBDA_FUNCTION_ARN: 'aws.lambda.function.arn',
+  AWS_SERVICE_TYPE: 'aws.service.type',
 };
diff --git a/aws-distro-opentelemetry-node-autoinstrumentation/src/aws-opentelemetry-configurator.ts b/aws-distro-opentelemetry-node-autoinstrumentation/src/aws-opentelemetry-configurator.ts
index f453e325..7860f29d 100644
--- a/aws-distro-opentelemetry-node-autoinstrumentation/src/aws-opentelemetry-configurator.ts
+++ b/aws-distro-opentelemetry-node-autoinstrumentation/src/aws-opentelemetry-configurator.ts
@@ -78,6 +78,7 @@ import { OTLPAwsLogExporter } from './exporter/otlp/aws/logs/otlp-aws-log-export
 import { isAgentObservabilityEnabled } from './utils';
 import { BaggageSpanProcessor } from '@opentelemetry/baggage-span-processor';
 import { logs } from '@opentelemetry/api-logs';
+import { AWS_ATTRIBUTE_KEYS } from './aws-attribute-keys';
 
 const AWS_TRACES_OTLP_ENDPOINT_PATTERN = '^https://xray\\.([a-z0-9-]+)\\.amazonaws\\.com/v1/traces$';
 const AWS_LOGS_OTLP_ENDPOINT_PATTERN = '^https://logs\\.([a-z0-9-]+)\\.amazonaws\\.com/v1/logs$';
@@ -168,8 +169,8 @@ export class AwsOpentelemetryConfigurator {
       if (!resourceDetectorsFromEnv.includes('env')) {
         defaultDetectors.push(envDetectorSync);
       }
-    } else if (isLambdaEnvironment()) {
-      // If in Lambda environment, only keep env detector as default
+    } else if (isLambdaEnvironment() || isAgentObservabilityEnabled()) {
+      // Only keep env detector here
       defaultDetectors.push(envDetectorSync);
     } else {
       /*
@@ -193,7 +194,7 @@ export class AwsOpentelemetryConfigurator {
       detectors: defaultDetectors,
     };
 
-    autoResource = autoResource.merge(detectResourcesSync(internalConfig));
+    autoResource = this.customizeResource(autoResource.merge(detectResourcesSync(internalConfig)));
     this.resource = autoResource;
 
     this.instrumentations = instrumentations;
@@ -228,6 +229,17 @@ export class AwsOpentelemetryConfigurator {
     return autoResource;
   }
 
+  private customizeResource(resource: Resource) {
+    if (isAgentObservabilityEnabled()) {
+      // Add aws.service.type if it doesn't exist in the resource
+      if (!resource.attributes[AWS_ATTRIBUTE_KEYS.AWS_SERVICE_TYPE]) {
+        // Set a default agent type for AI agent observability
+        resource.attributes[AWS_ATTRIBUTE_KEYS.AWS_SERVICE_TYPE] = 'gen_ai_agent';
+      }
+    }
+    return resource;
+  }
+
   public configure(): Partial<NodeSDKConfiguration> {
     // config.autoDetectResources is set to False, as the resources are detected and added to the
     // resource ahead of time. The resource is needed to be populated ahead of time instead of letting
diff --git a/aws-distro-opentelemetry-node-autoinstrumentation/test/aws-opentelemetry-configurator.test.ts b/aws-distro-opentelemetry-node-autoinstrumentation/test/aws-opentelemetry-configurator.test.ts
index 5d422c81..c1ebe882 100644
--- a/aws-distro-opentelemetry-node-autoinstrumentation/test/aws-opentelemetry-configurator.test.ts
+++ b/aws-distro-opentelemetry-node-autoinstrumentation/test/aws-opentelemetry-configurator.test.ts
@@ -52,6 +52,8 @@ import { AwsXRayRemoteSampler } from '../src/sampler/aws-xray-remote-sampler';
 import { AwsXraySamplingClient } from '../src/sampler/aws-xray-sampling-client';
 import { GetSamplingRulesResponse } from '../src/sampler/remote-sampler.types';
 import { BaggageSpanProcessor } from '@opentelemetry/baggage-span-processor';
+import { ATTR_SERVICE_NAME } from '@opentelemetry/semantic-conventions';
+import { AWS_ATTRIBUTE_KEYS } from '../src/aws-attribute-keys';
 import {
   BatchLogRecordProcessor,
   ConsoleLogRecordExporter,
@@ -1183,4 +1185,38 @@ describe('AwsOpenTelemetryConfiguratorTest', () => {
       delete process.env[key];
     }
   }
+
+  it('CustomizeResourceWithoutAgentObservability', () => {
+    delete process.env.AGENT_OBSERVABILITY_ENABLED;
+
+    let resource = new Resource({ [ATTR_SERVICE_NAME]: 'test-service' });
+    resource = awsOtelConfigurator['customizeResource'](resource);
+    expect(resource.attributes[ATTR_SERVICE_NAME]).toEqual('test-service');
+    expect(resource.attributes).not.toHaveProperty(AWS_ATTRIBUTE_KEYS.AWS_SERVICE_TYPE);
+  });
+
+  it('CustomizeResourceWithAgentObservabilityDefault', () => {
+    process.env.AGENT_OBSERVABILITY_ENABLED = 'true';
+
+    let resource = new Resource({ [ATTR_SERVICE_NAME]: 'test-service' });
+    resource = awsOtelConfigurator['customizeResource'](resource);
+    expect(resource.attributes[ATTR_SERVICE_NAME]).toEqual('test-service');
+    expect(resource.attributes[AWS_ATTRIBUTE_KEYS.AWS_SERVICE_TYPE]).toEqual('gen_ai_agent');
+
+    delete process.env.AGENT_OBSERVABILITY_ENABLED;
+  });
+
+  it('CustomizeResourceWithoutAgentObservability', () => {
+    process.env.AGENT_OBSERVABILITY_ENABLED = 'true';
+
+    let resource = new Resource({
+      [ATTR_SERVICE_NAME]: 'test-service',
+      [AWS_ATTRIBUTE_KEYS.AWS_SERVICE_TYPE]: 'existing-agent',
+    });
+    resource = awsOtelConfigurator['customizeResource'](resource);
+    expect(resource.attributes[ATTR_SERVICE_NAME]).toEqual('test-service');
+    expect(resource.attributes[AWS_ATTRIBUTE_KEYS.AWS_SERVICE_TYPE]).toEqual('existing-agent');
+
+    delete process.env.AGENT_OBSERVABILITY_ENABLED;
+  });
 });