diff --git a/src/Contracts/SchemaInterface.php b/src/Contracts/SchemaInterface.php
index d4b0628..17c940f 100644
--- a/src/Contracts/SchemaInterface.php
+++ b/src/Contracts/SchemaInterface.php
@@ -6,17 +6,100 @@
 
 interface SchemaInterface
 {
+        /**
+         * Get the name of the column.
+         *
+         * @return string The name of the column.
+         */
         public function getColumn(): string;
+
+        /**
+         * Get the data type of the column.
+         *
+         * @return string The data type of the column.
+         */
         public function getDataType(): string;
+
+        /**
+         * Get the default value for the column.
+         *
+         * @return mixed The default value for the column.
+         */
         public function getDefaultValue(): mixed;
+
+        /**
+         * Check if the column is nullable.
+         *
+         * @return bool True if the column is nullable, false otherwise.
+         */
         public function isNullable(): bool;
+
+        /**
+         * Check if the column is set to auto-increment.
+         *
+         * @return bool True if the column is set to auto-increment, false otherwise.
+         */
         public function isAutoIncrement(): bool;
+
+        /**
+         * Check if the column values must be unique.
+         *
+         * @return bool True if the column values must be unique, false otherwise.
+         */
         public function isUnique(): bool;
+
+        /**
+         * Create a new Schema instance with a different column name.
+         *
+         * @param string $column The new column name.
+         * @return self The new Schema instance.
+         */
         public function withColumn(string $column): self;
+
+        /**
+         * Create a new Schema instance with a different data type.
+         *
+         * @param string $dataType The new data type.
+         * @return self The new Schema instance.
+         */
         public function withDataType(string $dataType): self;
-        public function withDefaultValue(string $defaultValue): self;
+
+        /**
+         * Create a new Schema instance with a different default value.
+         *
+         * @param mixed $defaultValue The new default value.
+         * @return self The new Schema instance.
+         */
+        public function withDefaultValue(mixed $defaultValue): self;
+
+        /**
+         * Create a new Schema instance with a different nullable status.
+         *
+         * @param bool $nullable The new nullable status.
+         * @return self The new Schema instance.
+         */
         public function withNullable(bool $nullable): self;
+
+        /**
+         * Create a new Schema instance with a different auto-increment status.
+         *
+         * @param bool $autoIncrement The new auto-increment status.
+         * @return self The new Schema instance.
+         */
         public function withAutoIncrement(bool $autoIncrement): self;
+
+        /**
+         * Create a new Schema instance with a different unique status.
+         *
+         * @param bool $unique The new unique status.
+         * @return self The new Schema instance.
+         */
         public function withUnique(bool $unique): self;
-        public function toArray():array;
+
+        /**
+         * Convert the Schema instance to an array.
+         *
+         * @return array The array representation of the Schema instance.
+         */
+        public function toArray(): array;
 }
\ No newline at end of file