diff --git a/api/core/tools/entities/tool_entities.py b/api/core/tools/entities/tool_entities.py
index 2e4433d9f..e31dec55d 100644
--- a/api/core/tools/entities/tool_entities.py
+++ b/api/core/tools/entities/tool_entities.py
@@ -148,7 +148,7 @@ class ToolParameter(BaseModel):
     form: ToolParameterForm = Field(..., description="The form of the parameter, schema/form/llm")
     llm_description: Optional[str] = None
     required: Optional[bool] = False
-    default: Optional[Union[int, str]] = None
+    default: Optional[Union[float, int, str]] = None
     min: Optional[Union[float, int]] = None
     max: Optional[Union[float, int]] = None
     options: Optional[list[ToolParameterOption]] = None
diff --git a/api/core/tools/provider/builtin/siliconflow/tools/stable_diffusion.yaml b/api/core/tools/provider/builtin/siliconflow/tools/stable_diffusion.yaml
index abb541c48..dce10adc8 100644
--- a/api/core/tools/provider/builtin/siliconflow/tools/stable_diffusion.yaml
+++ b/api/core/tools/provider/builtin/siliconflow/tools/stable_diffusion.yaml
@@ -85,7 +85,7 @@ parameters:
   - name: guidance_scale
     type: number
     required: true
-    default: 7
+    default: 7.5
     min: 0
     max: 100
     label: