Issue 23579 (#26777)

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: crazywoola <100913391+crazywoola@users.noreply.github.com>

api/core/tools/mcp_tool/provider.py

@@ -76,7 +76,8 @@ class MCPToolProviderController(ToolProviderController):
             )
             for remote_mcp_tool in remote_mcp_tools
         ]
-
+        if not db_provider.icon:
+            raise ValueError("Database provider icon is required")
         return cls(
             entity=ToolProviderEntityWithPlugin(
                 identity=ToolProviderIdentity(

api/core/tools/utils/model_invocation_utils.py

@@ -5,6 +5,7 @@ Therefore, a model manager is needed to list/invoke/validate models.
 """
 
 import json
+from decimal import Decimal
 from typing import cast
 
 from core.model_manager import ModelManager
@@ -118,10 +119,10 @@ class ModelInvocationUtils:
             model_response="",
             prompt_tokens=prompt_tokens,
             answer_tokens=0,
-            answer_unit_price=0,
-            answer_price_unit=0,
+            answer_unit_price=Decimal(),
+            answer_price_unit=Decimal(),
             provider_response_latency=0,
-            total_price=0,
+            total_price=Decimal(),
             currency="USD",
         )
 
@@ -152,7 +153,7 @@ class ModelInvocationUtils:
             raise InvokeModelError(f"Invoke error: {e}")
 
         # update tool model invoke
-        tool_model_invoke.model_response = response.message.content
+        tool_model_invoke.model_response = str(response.message.content)
         if response.usage:
             tool_model_invoke.answer_tokens = response.usage.completion_tokens
             tool_model_invoke.answer_unit_price = response.usage.completion_unit_price