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<?php |
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/** |
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* Ability for discovering available WordPress abilities. |
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* |
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* @package McpAdapter |
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*/ |
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|
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declare( strict_types=1 ); |
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|
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namespace WP\MCP\Abilities; |
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|
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use WP_Error; |
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|
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/** |
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* Discover Abilities - Lists all available WordPress abilities in the system. |
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* |
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* This ability provides discovery functionality for the MCP protocol. |
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* It discovers all registered WordPress abilities in the system. |
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* |
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* SECURITY CONSIDERATIONS: |
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* - This ability exposes information about all registered abilities in the system |
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* - Only abilities with effective MCP public exposure will be returned |
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* - Requires proper WordPress capability checks for secure operation |
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* |
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* @see https://developer.wordpress.org/apis/security/ for detailed security guidance |
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*/ |
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final class DiscoverAbilitiesAbility { |
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use McpAbilityHelperTrait; |
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|
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/** |
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* Register the ability. |
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*/ |
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public static function register(): void { |
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wp_register_ability( |
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'mcp-adapter/discover-abilities', |
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array( |
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'label' => 'Discover Abilities', |
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'description' => 'Discover all available WordPress abilities in the system. Returns a list of all registered abilities with their basic information.', |
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'category' => 'mcp-adapter', |
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'output_schema' => array( |
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'type' => 'object', |
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'properties' => array( |
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'abilities' => array( |
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'type' => 'array', |
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'items' => array( |
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'type' => 'object', |
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'properties' => array( |
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'name' => array( 'type' => 'string' ), |
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'label' => array( 'type' => 'string' ), |
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'description' => array( 'type' => 'string' ), |
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), |
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'required' => array( 'name', 'label', 'description' ), |
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), |
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), |
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), |
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'required' => array( 'abilities' ), |
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), |
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'permission_callback' => array( self::class, 'check_permission' ), |
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'execute_callback' => array( self::class, 'execute' ), |
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'meta' => array( |
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'annotations' => array( |
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'readonly' => true, |
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'destructive' => false, |
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'idempotent' => true, |
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), |
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), |
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) |
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); |
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} |
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|
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/** |
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* Execute the discover abilities functionality. |
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* |
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* Note: Permission checks are handled by the WP_Ability::execute() framework method |
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* before this callback is invoked. |
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* |
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* @see \WP_Ability::execute() |
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* |
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* @param array $input Input parameters (unused for this ability). |
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* |
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* @return array Array containing public MCP abilities. |
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*/ |
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// phpcs:ignore Generic.CodeAnalysis.UnusedFunctionParameter.Found -- Required by the ability callback. |
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public static function execute( $input = array() ): array { |
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// Get all abilities and filter for publicly exposed ones |
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$abilities = wp_get_abilities(); |
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|
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$ability_list = array(); |
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foreach ( $abilities as $ability ) { |
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$ability_name = $ability->get_name(); |
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|
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// Check if ability is publicly exposed via MCP |
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if ( ! self::is_ability_mcp_public( $ability ) ) { |
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continue; |
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} |
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|
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// Only discover abilities with type='tool' (default type) |
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if ( self::get_ability_mcp_type( $ability ) !== 'tool' ) { |
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continue; |
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} |
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|
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$ability_list[] = array( |
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'name' => $ability_name, |
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'label' => $ability->get_label(), |
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'description' => $ability->get_description(), |
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); |
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} |
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|
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return array( |
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'abilities' => $ability_list, |
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); |
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} |
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|
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/** |
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* Check permissions for discovering abilities. |
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* |
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* Validates user capabilities and caller identity. |
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* |
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* @param array $input Input parameters (unused for this ability). |
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* |
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* @return bool|\WP_Error True if the user has permission to discover abilities. |
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*/ |
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// phpcs:ignore Generic.CodeAnalysis.UnusedFunctionParameter.Found -- Required by the ability callback. |
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public static function check_permission( $input = array() ) { |
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// Verify caller identity - ensure user is authenticated |
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if ( ! is_user_logged_in() ) { |
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return new WP_Error( 'authentication_required', 'User must be authenticated to access this ability' ); |
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} |
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|
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/** |
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* Filters the capability required to discover available abilities. |
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* |
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* This capability is checked before listing all registered WordPress abilities |
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* through the mcp-adapter-discover-abilities tool. |
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* |
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* @since 0.3.0 |
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* |
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* @param string $capability The required capability. Default 'read'. |
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*/ |
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$required_capability = apply_filters( 'mcp_adapter_discover_abilities_capability', 'read' ); |
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// phpcs:ignore WordPress.WP.Capabilities.Undetermined -- Capability is determined dynamically via filter |
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if ( ! current_user_can( $required_capability ) ) { |
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return new WP_Error( |
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'insufficient_capability', |
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sprintf( 'User lacks required capability: %s', $required_capability ) |
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); |
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} |
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|
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return true; |
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} |
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} |
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|
