fix: remove default:[] from image_urls, short descriptions

server.mjs

@@ -408,8 +408,7 @@ function registerHandlers(srv) {
               description:
                 'Optional reference images. Each item is an http(s):// URL OR ' +
                 'a data:image/... URL. Up to ~4 references recommended for best ' +
-                'compatibility. Empty array = no refs.',
-              default: [],
+                'compatibility.',
             },
           },
           required: ['prompt'],
@@ -419,17 +418,14 @@ function registerHandlers(srv) {
         name: 'generate_image_transparent',
         description:
           'Generate an image with a TRANSPARENT background (alpha channel PNG). ' +
-          'Only works with models that support background removal natively: ' +
-          'recraft/recraft-v3, openai/gpt-image-1, openai/gpt-image-1-mini, ' +
-          'openai/gpt-image-2, openai/gpt-5-image, openai/gpt-5-image-mini. ' +
-          'Other models will return an error from the upstream. ' +
+          'Supported models: recraft/recraft-v3, openai/gpt-image-1, gpt-image-1-mini, ' +
+          'gpt-image-2, gpt-5-image, gpt-5-image-mini. ' +
           'Aspect: square|landscape|portrait. ' +
-          'Optional image_urls — use to apply style from reference images while ' +
-          'keeping transparent background.',
+          'Optional image_urls for style references.',
         inputSchema: {
           type: 'object',
           properties: {
-            prompt: { type: 'string', description: 'Text prompt (mention "isolated on transparent background" for best results)' },
+            prompt: { type: 'string', description: 'Text prompt' },
             model: {
               type: 'string',
               enum: TRANSPARENT_MODELS,
@@ -443,11 +439,7 @@ function registerHandlers(srv) {
             image_urls: {
               type: 'array',
               items: { type: 'string' },
-              description:
-                'Optional reference images. Each item is an http(s):// URL OR ' +
-                'a data:image/... URL. For Recraft v3: single reference. ' +
-                'For GPT-Image: up to ~4 references recommended.',
-              default: [],
+              description: 'Optional reference image URLs.',
             },
           },
           required: ['prompt'],