diff --git a/.well-known/skills.yaml b/.well-known/skills.yaml
index 7a035910c..06b9ffd0c 100644
--- a/.well-known/skills.yaml
+++ b/.well-known/skills.yaml
@@ -4,9 +4,11 @@ entities:
      - name: text_to_speech
        description: Text-to-speech
        id: text_to_speech.text_to_speech
-       requisite:
-       - AZURE_TTS_SUBSCRIPTION_KEY
-       - AZURE_TTS_REGION
+       x-prerequisite:
+         - name: AZURE_TTS_SUBSCRIPTION_KEY
+           description: "For more details, check out: [Azure Text-to_Speech](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/language-support?tabs=tts)"
+         - name: AZURE_TTS_REGION
+           description: "For more details, check out: [Azure Text-to_Speech](https://learn.microsoft.com/en-us/azure/ai-services/speech-service/language-support?tabs=tts)"
        arguments:
          text: 'The text used for voice conversion. Required.'
          lang: 'The value can contain a language code such as en (English), or a locale such as en-US (English - United States). The optional parameter are "English", "Chinese". Default value: "Chinese".'
@@ -27,9 +29,11 @@ entities:
      - name: text_to_image
        description: Create a drawing based on the text.
        id: text_to_image.text_to_image
-       requisite:
-       - OPENAI_API_KEY
-       - METAGPT_TEXT_TO_IMAGE_MODEL
+       x-prerequisite:
+       - name: OPENAI_API_KEY
+         description: "OpenAI API key, For more details, checkout: `https://platform.openai.com/account/api-keys`"
+       - name: METAGPT_TEXT_TO_IMAGE_MODEL_URL
+         description: "Model url."
        arguments:
          text: 'The text used for image conversion. Required.'
          size_type: 'Default value: "512x512".'
diff --git a/metagpt/learn/text_to_image.py b/metagpt/learn/text_to_image.py
index 2f946e239..d245b06db 100644
--- a/metagpt/learn/text_to_image.py
+++ b/metagpt/learn/text_to_image.py
@@ -28,7 +28,7 @@ def text_to_image(text, size_type: str = "512x512", openai_api_key="", model_url
     """
     initialize_environment()
     image_declaration = "data:image/png;base64,"
-    if os.environ.get("METAGPT_TEXT_TO_IMAGE_MODEL") or model_url:
+    if os.environ.get("METAGPT_TEXT_TO_IMAGE_MODEL_URL") or model_url:
         data = oas3_metagpt_text_to_image(text, size_type, model_url)
         return image_declaration + data if data else ""
     if os.environ.get("OPENAI_API_KEY") or openai_api_key: