diff --git a/src/AnnotationReader.php b/src/AnnotationReader.php
new file mode 100644
index 0000000..d185961
--- /dev/null
+++ b/src/AnnotationReader.php
@@ -0,0 +1,8 @@
+<?php declare(strict_types=1);
+
+namespace Igni\Annotation;
+
+class AnnotationReader
+{
+    public function 
+}
diff --git a/src/Context.php b/src/Context.php
index 421fdd9..b4f459d 100644
--- a/src/Context.php
+++ b/src/Context.php
@@ -27,8 +27,14 @@ final class Context
      */
     private $imports = [];
 
+    /**
+     * @var string
+     */
     private $target;
 
+    /**
+     * @var string
+     */
     private $namespace;
 
     public function __construct(
@@ -103,7 +109,7 @@ public static function fromReflectionClass(ReflectionClass $class) : self
         $instance = new self(
             Target::TARGET_CLASS,
             $class->getNamespaceName(),
-            $class->getName()
+            $class->name
         );
         $imports = new ReflectorImports($class);
         $instance->imports = $imports->getImports();
@@ -116,7 +122,7 @@ public static function fromReflectionMethod(ReflectionMethod $method) : self
         $instance = new self(
             Target::TARGET_METHOD,
             $method->getDeclaringClass()->getNamespaceName(),
-            "{$method->getDeclaringClass()->getName()}::{$method->getName()}()"
+            "{$method->getDeclaringClass()->name}::{$method->name}()"
         );
         $imports = new ReflectorImports($method);
         $instance->imports = $imports->getImports();
@@ -129,7 +135,7 @@ public static function fromReflectionProperty(ReflectionProperty $property) : se
         $instance = new self(
             Target::TARGET_PROPERTY,
             $property->getDeclaringClass()->getNamespaceName(),
-            "{$property->getDeclaringClass()->getName()}::\${$property->getName()}"
+            "{$property->getDeclaringClass()->name}::\${$property->name}"
         );
         $imports = new ReflectorImports($property);
         $instance->imports = $imports->getImports();
@@ -142,7 +148,7 @@ public static function fromReflectionFunction(ReflectionFunction $function) : se
         $instance = new self(
             Target::TARGET_FUNCTION,
             $function->getNamespaceName(),
-            "{$function->getName()}()"
+            "{$function->name}()"
         );
         $imports = new ReflectorImports($function);
         $instance->imports = $imports->getImports();
diff --git a/src/Exception/MetaDataException.php b/src/Exception/MetaDataException.php
index 5ad1148..bff0ef4 100644
--- a/src/Exception/MetaDataException.php
+++ b/src/Exception/MetaDataException.php
@@ -17,4 +17,9 @@ public static function forUndefinedAttribute(MetaData $metaData, string $attribu
     {
         return new self("Annotation class {$metaData->getClass()} defines no attribute {$attribute}.");
     }
+
+    public static function forUnresolvableFailedAttribute(MetaData $metaData) : self
+    {
+        return new self("Could not get last failed attribute from {$metaData->getClass()}");
+    }
 }
diff --git a/src/Exception/ParserException.php b/src/Exception/ParserException.php
index ffca88f..5c264f7 100644
--- a/src/Exception/ParserException.php
+++ b/src/Exception/ParserException.php
@@ -3,13 +3,13 @@
 namespace Igni\Annotation\Exception;
 
 use Igni\Annotation\Context;
+use Igni\Annotation\MetaData\Attribute;
 use Igni\Annotation\Token;
 use Igni\Exception\LogicException;
-use Throwable;
 
 final class ParserException extends LogicException implements AnnotationException
 {
-    public static function forUnexpectedToken(Token $token, Context $context) : Throwable
+    public static function forUnexpectedToken(Token $token, Context $context) : self
     {
         $context = $context->getSymbol() ?: (string) $context;
         $message = "Unexpected `{$token}` in {$context} at index: {$token->getPosition()}.";
@@ -17,7 +17,7 @@ public static function forUnexpectedToken(Token $token, Context $context) : Thro
         return new self($message);
     }
 
-    public static function forUnknownAnnotationClass(string $name, Context $context) : Throwable
+    public static function forUnknownAnnotationClass(string $name, Context $context) : self
     {
         $message = "Could not find annotation class {$name} used in {$context}." .
             "Please check your composer settings, or use Parser::registerNamespace.";
@@ -25,7 +25,7 @@ public static function forUnknownAnnotationClass(string $name, Context $context)
         return new self($message);
     }
 
-    public static function forUsingNonAnnotationClassAsAnnotation(string $class, Context $context) : Throwable
+    public static function forUsingNonAnnotationClassAsAnnotation(string $class, Context $context) : self
     {
         $message = "Used {$class} as annotation - class is not marked as annotation. Used in {$context}." .
             "Please add `@Annotation` annotation to mark class as annotation class.";
@@ -33,9 +33,19 @@ public static function forUsingNonAnnotationClassAsAnnotation(string $class, Con
         return new self($message);
     }
 
-    public static function forUndefinedConstant(Context $context, string $name) : Throwable
+    public static function forUndefinedConstant(Context $context, string $name) : self
     {
         $message = "Using undefined constant `{$name}` in {$context}";
         return new self($message);
     }
+
+    public static function forInvalidAttributeValue(Context $context, string $annotationClass, Attribute $failedAttribute) : self
+    {
+        return new self("Failed to validate `{$failedAttribute->getName()}` attribute in @{$annotationClass} used in {$context}");
+    }
+
+    public static function forInvalidTarget(Context $context, string $target, string $annotationClass) : self
+    {
+        return new self("Invalid target `{$target}`` for annotation `@{$annotationClass}` used in {$context}");
+    }
 }
diff --git a/src/MetaData/Attribute.php b/src/MetaData/Attribute.php
index 005ed9d..c6b84d2 100644
--- a/src/MetaData/Attribute.php
+++ b/src/MetaData/Attribute.php
@@ -17,6 +17,11 @@ public function __construct(string $name, $type = 'mixed', bool $required = true
         $this->required = $required;
     }
 
+    public function getName() : string
+    {
+        return $this->name;
+    }
+
     public function getType() : string
     {
         if (is_array($this->type)) {
diff --git a/src/MetaData/MetaData.php b/src/MetaData/MetaData.php
index 7593a8a..8aa5080 100644
--- a/src/MetaData/MetaData.php
+++ b/src/MetaData/MetaData.php
@@ -22,17 +22,50 @@ final class MetaData
         Enum::class => 1,
         NoValidate::class => 1,
     ];
+
+    /**
+     * @var Parser
+     */
     private $parser;
+
+    /**
+     * @var Context
+     */
     private $context;
-    private $target = [Target::TARGET_ALL];
+
+    /**
+     * @var array
+     */
+    private $validTargets = [Target::TARGET_ALL];
+
+    /**
+     * @var bool
+     */
     private $validate = true;
+
+    /**
+     * @var bool
+     */
     private $hasConstructor = false;
+
+    /**
+     * @var bool
+     */
     private $isAnnotation = true;
+
+    /**
+     * @var string
+     */
     private $className;
+
     /**
      * @var Attribute[]
      */
     private $attributes = [];
+
+    /**
+     * @var Attribute|null
+     */
     private $lastFailedAttribute;
 
     public function __construct(string $class, Parser $parser = null)
@@ -86,11 +119,17 @@ public function getAttribute(string $name) : Attribute
 
     public function validateTarget(string $target) : bool
     {
-        return in_array(Target::TARGET_ALL, $this->target) || in_array($target, $this->target);
+        return in_array(Target::TARGET_ALL, $this->validTargets) || in_array($target, $this->validTargets);
     }
 
     public function validateAttributes(array $data) : bool
     {
+        if (!$this->validate) {
+            return true;
+        }
+
+        $this->lastFailedAttribute = null;
+
         foreach ($this->attributes as $name => $attribute) {
             if (!isset($data[$name])) {
                 if ($attribute->isRequired()) {
@@ -108,6 +147,20 @@ public function validateAttributes(array $data) : bool
         return true;
     }
 
+    public function hasFailedAttribute() : bool
+    {
+        return null !== $this->lastFailedAttribute;
+    }
+
+    public function getFailedAttribute() : Attribute
+    {
+        if (!$this->hasFailedAttribute()) {
+            throw MetaDataException::forUnresolvableFailedAttribute($this);
+        }
+
+        return $this->lastFailedAttribute;
+    }
+
     private function collect(ReflectionClass $class) : void
     {
         $this->className = $class->getName();
@@ -138,7 +191,7 @@ private function collectClassMeta(ReflectionClass $class)
                             $this->context
                         );
                     }
-                    $this->target = $annotation->value;
+                    $this->validTargets = $annotation->value;
                     break;
                 case NoValidate::class:
                     $this->validate = false;
diff --git a/src/Parser.php b/src/Parser.php
index 47560e4..b51f4b1 100644
--- a/src/Parser.php
+++ b/src/Parser.php
@@ -136,9 +136,15 @@ private function parseAnnotation(Tokenizer $tokenizer, Context $context, $nested
         }
 
         $metaData = $this->getMetaData($annotationClass, $context);
-        if (!$metaData->hasConstructor()) {
-            if ($metaData->validateAttributes($arguments)) {
 
+        $target = $nested ? Target::TARGET_ANNOTATION : $context->getTarget();
+        if (!$metaData->validateTarget($target)) {
+            throw ParserException::forInvalidTarget($context, $target, $annotationClass);
+        }
+
+        if (!$metaData->hasConstructor()) {
+            if (!$metaData->validateAttributes($arguments)) {
+                throw ParserException::forInvalidAttributeValue($context, $annotationClass, $metaData->getFailedAttribute());
             }
             $annotation = new $annotationClass();
             $valueArgs = [];
diff --git a/tests/MetaDataTest.php b/tests/MetaDataTest.php
index 5d835e4..43f8b26 100644
--- a/tests/MetaDataTest.php
+++ b/tests/MetaDataTest.php
@@ -72,7 +72,7 @@ public function testValidateAttributes() : void
     {
         $meta = new MetaData(SimpleAnnotation::class);
         self::assertTrue($meta->validateAttributes([]));
-        self::assertFalse($meta->validateAttributes(['attribute' => 1]));
+        self::assertTrue($meta->validateAttributes(['attribute' => 1]));
         self::assertTrue($meta->validateAttributes(['attribute' => 'a']));
         self::assertTrue($meta->validateAttributes(['attribute' => 'b']));
         self::assertTrue($meta->validateAttributes(['attribute' => 'c']));