diff --git a/x-pack/solutions/observability/plugins/apm/common/rules/schema.ts b/x-pack/solutions/observability/plugins/apm/common/rules/schema.ts
index 29a1c36675c11..92411e79ce371 100644
--- a/x-pack/solutions/observability/plugins/apm/common/rules/schema.ts
+++ b/x-pack/solutions/observability/plugins/apm/common/rules/schema.ts
@@ -25,7 +25,7 @@ export const errorCountParamsSchema = schema.object({
   threshold: schema.number(),
   serviceName: schema.maybe(schema.string()),
   environment: schema.string(),
-  groupBy: schema.maybe(schema.arrayOf(schema.string())),
+  groupBy: schema.maybe(schema.arrayOf(schema.string(), { maxSize: 10 })),
   errorGroupingKey: schema.maybe(schema.string()),
   useKqlFilter: schema.maybe(schema.boolean()),
   searchConfiguration: schema.maybe(searchConfigurationSchema),
@@ -44,7 +44,7 @@ export const transactionDurationParamsSchema = schema.object({
     schema.literal(AggregationType.P99),
   ]),
   environment: schema.string(),
-  groupBy: schema.maybe(schema.arrayOf(schema.string())),
+  groupBy: schema.maybe(schema.arrayOf(schema.string(), { maxSize: 10 })),
   useKqlFilter: schema.maybe(schema.boolean()),
   searchConfiguration: schema.maybe(searchConfigurationSchema),
 });
@@ -67,7 +67,7 @@ export const anomalyParamsSchema = schema.object({
     schema.literal(ML_ANOMALY_SEVERITY.MINOR),
     schema.literal(ML_ANOMALY_SEVERITY.WARNING),
   ]),
-  anomalyDetectorTypes: schema.maybe(schema.arrayOf(detectorsSchema, { minSize: 1 })),
+  anomalyDetectorTypes: schema.maybe(schema.arrayOf(detectorsSchema, { minSize: 1, maxSize: 3 })),
 });
 
 export const transactionErrorRateParamsSchema = schema.object({
@@ -78,7 +78,7 @@ export const transactionErrorRateParamsSchema = schema.object({
   transactionName: schema.maybe(schema.string()),
   serviceName: schema.maybe(schema.string()),
   environment: schema.string(),
-  groupBy: schema.maybe(schema.arrayOf(schema.string())),
+  groupBy: schema.maybe(schema.arrayOf(schema.string(), { maxSize: 10 })),
   useKqlFilter: schema.maybe(schema.boolean()),
   searchConfiguration: schema.maybe(searchConfigurationSchema),
 });
diff --git a/x-pack/solutions/observability/plugins/profiling/server/routes/apm.ts b/x-pack/solutions/observability/plugins/profiling/server/routes/apm.ts
index f795bd25295bc..9e7c0b8867e53 100644
--- a/x-pack/solutions/observability/plugins/profiling/server/routes/apm.ts
+++ b/x-pack/solutions/observability/plugins/profiling/server/routes/apm.ts
@@ -19,7 +19,7 @@ const querySchema = schema.object({
   timeFrom: schema.number(),
   timeTo: schema.number(),
   functionName: schema.string(),
-  serviceNames: schema.arrayOf(schema.string()),
+  serviceNames: schema.arrayOf(schema.string(), { maxSize: 10 }),
 });
 
 type QuerySchemaType = TypeOf<typeof querySchema>;