fix(backend): resolve type errors from Anthropic/OpenAI SDK updates

- Change convert_openai_tool_fmt_to_anthropic return type from
  Iterable[ToolParam] | NotGiven to list[ToolParam] | None
- Use conditional kwargs for Anthropic tools parameter
- Fix get_parallel_tool_calls to return NotGiven instead of Omit
  (openai.omit doesn't exist, openai.NOT_GIVEN is correct)

autogpt_platform/backend/backend/blocks/llm.py

@@ -531,12 +531,12 @@ class LLMResponse(BaseModel):
 
 def convert_openai_tool_fmt_to_anthropic(
     openai_tools: list[dict] | None = None,
-) -> Iterable[ToolParam] | anthropic.NotGiven:
+) -> list[ToolParam] | None:
     """
     Convert OpenAI tool format to Anthropic tool format.
     """
     if not openai_tools or len(openai_tools) == 0:
-        return anthropic.NOT_GIVEN
+        return None
 
     anthropic_tools = []
     for tool in openai_tools:
@@ -596,10 +596,10 @@ def extract_openai_tool_calls(response) -> list[ToolContentBlock] | None:
 
 def get_parallel_tool_calls_param(
     llm_model: LlmModel, parallel_tool_calls: bool | None
-) -> bool | openai.Omit:
+) -> bool | openai.NotGiven:
     """Get the appropriate parallel_tool_calls parameter for OpenAI-compatible APIs."""
     if llm_model.startswith("o") or parallel_tool_calls is None:
-        return openai.omit
+        return openai.NOT_GIVEN
     return parallel_tool_calls
 
 
@@ -717,14 +717,16 @@ async def llm_call(
             api_key=credentials.api_key.get_secret_value()
         )
         try:
-            resp = await client.messages.create(
-                model=llm_model.value,
-                system=sysprompt,
-                messages=messages,
-                max_tokens=max_tokens,
-                tools=an_tools,
-                timeout=600,
-            )
+            create_kwargs: dict[str, Any] = {
+                "model": llm_model.value,
+                "system": sysprompt,
+                "messages": messages,
+                "max_tokens": max_tokens,
+                "timeout": 600,
+            }
+            if an_tools:
+                create_kwargs["tools"] = an_tools
+            resp = await client.messages.create(**create_kwargs)
 
             if not resp.content:
                 raise ValueError("No content returned from Anthropic.")