diff --git a/data-prepper-plugins/aggregate-processor/src/main/java/org/opensearch/dataprepper/plugins/processor/aggregate/AggregateProcessorConfig.java b/data-prepper-plugins/aggregate-processor/src/main/java/org/opensearch/dataprepper/plugins/processor/aggregate/AggregateProcessorConfig.java
index bd08de94c6..e1522b23ed 100644
--- a/data-prepper-plugins/aggregate-processor/src/main/java/org/opensearch/dataprepper/plugins/processor/aggregate/AggregateProcessorConfig.java
+++ b/data-prepper-plugins/aggregate-processor/src/main/java/org/opensearch/dataprepper/plugins/processor/aggregate/AggregateProcessorConfig.java
@@ -31,7 +31,7 @@ public class AggregateProcessorConfig {
 
     @JsonPropertyDescription("An unordered list by which to group events. Events with the same values as these keys are put into the same group. " +
             "If an event does not contain one of the <code>identification_keys</code>, then the value of that key is considered to be equal to <code>null</code>. " +
-            "At least one <code>identification_key</code> is required. And example configuration is [\"sourceIp\", \"destinationIp\", \"port\"].")
+            "At least one <code>identification_key</code> is required. An example configuration is [\"sourceIp\", \"destinationIp\", \"port\"].")
     @JsonProperty("identification_keys")
     @NotEmpty
     @ExampleValues({
diff --git a/data-prepper-plugins/aws-lambda/src/main/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorConfig.java b/data-prepper-plugins/aws-lambda/src/main/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorConfig.java
index 5d7e05d7c0..cfa7417896 100644
--- a/data-prepper-plugins/aws-lambda/src/main/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorConfig.java
+++ b/data-prepper-plugins/aws-lambda/src/main/java/org/opensearch/dataprepper/plugins/lambda/processor/LambdaProcessorConfig.java
@@ -7,33 +7,44 @@
 
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonPropertyDescription;
+import com.fasterxml.jackson.annotation.JsonClassDescription;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+import org.opensearch.dataprepper.model.annotations.ExampleValues;
+import org.opensearch.dataprepper.model.annotations.ExampleValues.Example;
 import java.util.Collections;
 import java.util.List;
 import org.opensearch.dataprepper.plugins.lambda.common.config.InvocationType;
 import org.opensearch.dataprepper.plugins.lambda.common.config.LambdaCommonConfig;
 
+@JsonPropertyOrder
+@JsonClassDescription("The <code>aws_lambda</code> processor enables invocation of an AWS Lambda function within your Data Prepper pipeline in order to process events." + 
+        "It supports both synchronous and asynchronous invocations based on your use case.")
 public class LambdaProcessorConfig extends LambdaCommonConfig {
+  static final String DEFAULT_INVOCATION_TYPE = "request-response";
 
-  @JsonPropertyDescription("invocation type defines the way we want to call lambda function")
-  @JsonProperty("invocation_type")
+  @JsonPropertyDescription("Specifies the invocation type, either <code>request-response</code> or <code>event</code>. Default is <code>request-response</code>.")
+  @JsonProperty(value = "invocation_type", defaultValue = DEFAULT_INVOCATION_TYPE)
   private InvocationType invocationType = InvocationType.REQUEST_RESPONSE;
 
-  @JsonPropertyDescription("Defines the way Data Prepper treats the response from Lambda")
+  @JsonPropertyDescription("Specifies how Data Prepper interprets and processes Lambda function responses. Default is <code>false</code>.")
   @JsonProperty("response_events_match")
   private boolean responseEventsMatch = false;
 
-  @JsonPropertyDescription("defines a condition for event to use this processor")
-  @JsonProperty("lambda_when")
-  private String whenCondition;
-
   @JsonProperty("tags_on_failure")
   @JsonPropertyDescription(
       "A <code>List</code> of <code>String</code>s that specifies the tags to be set in the event when lambda fails to "
           +
           "or exception occurs. This tag may be used in conditional expressions in " +
-          "other parts of the configuration")
+          "other parts of the configuration.")
   private List<String> tagsOnFailure = Collections.emptyList();
 
+  @JsonPropertyDescription("Defines a condition for event to use this processor.")
+  @ExampleValues({
+          @Example(value = "event['status'] == 'process'", description = "The processor will only run on this condition.")
+  })
+  @JsonProperty("lambda_when")
+  private String whenCondition;
+
   public List<String> getTagsOnFailure() {
     return tagsOnFailure;
   }
diff --git a/data-prepper-plugins/key-value-processor/src/main/java/org/opensearch/dataprepper/plugins/processor/keyvalue/KeyValueProcessorConfig.java b/data-prepper-plugins/key-value-processor/src/main/java/org/opensearch/dataprepper/plugins/processor/keyvalue/KeyValueProcessorConfig.java
index 9c8edc7db3..501dbb9d54 100644
--- a/data-prepper-plugins/key-value-processor/src/main/java/org/opensearch/dataprepper/plugins/processor/keyvalue/KeyValueProcessorConfig.java
+++ b/data-prepper-plugins/key-value-processor/src/main/java/org/opensearch/dataprepper/plugins/processor/keyvalue/KeyValueProcessorConfig.java
@@ -124,13 +124,13 @@ public class KeyValueProcessorConfig {
     })
     private Object nonMatchValue = DEFAULT_NON_MATCH_VALUE;
 
-    @JsonProperty(value = "include_keys", defaultValue = "[]")
+    @JsonProperty("include_keys")
     @JsonPropertyDescription("An array specifying the keys that should be included in the destination field. " +
             "By default, all keys will be added.")
     @NotNull
     private List<String> includeKeys = DEFAULT_INCLUDE_KEYS;
 
-    @JsonProperty(value = "exclude_keys", defaultValue = "[]")
+    @JsonProperty("exclude_keys")
     @JsonPropertyDescription("An array specifying the parsed keys that should be excluded from the destination field. " +
             "By default, no keys will be excluded.")
     @NotNull
diff --git a/data-prepper-plugins/otel-metrics-source/src/test/java/org/opensearch/dataprepper/plugins/source/otelmetrics/OTelMetricsSourceTest.java b/data-prepper-plugins/otel-metrics-source/src/test/java/org/opensearch/dataprepper/plugins/source/otelmetrics/OTelMetricsSourceTest.java
index f3342a612e..4e67c050f5 100644
--- a/data-prepper-plugins/otel-metrics-source/src/test/java/org/opensearch/dataprepper/plugins/source/otelmetrics/OTelMetricsSourceTest.java
+++ b/data-prepper-plugins/otel-metrics-source/src/test/java/org/opensearch/dataprepper/plugins/source/otelmetrics/OTelMetricsSourceTest.java
@@ -36,7 +36,6 @@
 import io.opentelemetry.proto.collector.metrics.v1.ExportMetricsServiceRequest;
 import io.opentelemetry.proto.collector.metrics.v1.ExportMetricsServiceResponse;
 import io.opentelemetry.proto.collector.metrics.v1.MetricsServiceGrpc;
-import io.opentelemetry.proto.collector.trace.v1.TraceServiceGrpc;
 import io.opentelemetry.proto.metrics.v1.NumberDataPoint;
 
 import io.opentelemetry.proto.common.v1.InstrumentationLibrary;