diff --git a/README.md b/README.md
index 875eab5..27110eb 100644
--- a/README.md
+++ b/README.md
@@ -146,7 +146,7 @@ You can also debug the server using the [MCP Inspector](https://github.com/model
 # Run in UI mode with stdio transport (can switch to HTTP/SSE in the Web UI as needed)
 npx @modelcontextprotocol/inspector uv run modelscope-mcp-server
 
-# Run in CLI mode with HTTP transportt (can do operations across tools, resources, and prompts)
+# Run in CLI mode with HTTP transport (can do operations across tools, resources, and prompts)
 npx @modelcontextprotocol/inspector --cli http://127.0.0.1:8000/mcp/ --transport http --method tools/list
 ```
 
diff --git a/src/modelscope_mcp_server/tools/aigc.py b/src/modelscope_mcp_server/tools/aigc.py
index 7f2d288..7b507ea 100644
--- a/src/modelscope_mcp_server/tools/aigc.py
+++ b/src/modelscope_mcp_server/tools/aigc.py
@@ -41,8 +41,8 @@ async def generate_image(
         model: Annotated[
             str | None,
             Field(
-                description="The model's ID fo be used for image generation. "
-                "If not provided, uses the default model provided in server settings."
+                description="The model's ID to be used for image generation. "
+                "If not provided, the default model for the corresponding generation type (text-to-image or image-to-image) is used."
             ),
         ] = None,
         image_url: Annotated[