diff --git a/src/crewai_tools/tools/weaviate_tool/vector_search.py b/src/crewai_tools/tools/weaviate_tool/vector_search.py
index a9c7ce519..fc5641009 100644
--- a/src/crewai_tools/tools/weaviate_tool/vector_search.py
+++ b/src/crewai_tools/tools/weaviate_tool/vector_search.py
@@ -1,10 +1,12 @@
-from typing import Any, Type, Optional
-import os
 import json
+import os
+from typing import Any, Optional, Type
+
 try:
     import weaviate
     from weaviate.classes.config import Configure, Vectorizers
     from weaviate.classes.init import Auth
+
     WEAVIATE_AVAILABLE = True
 except ImportError:
     WEAVIATE_AVAILABLE = False
@@ -14,6 +16,7 @@ except ImportError:
     Auth = Any
 
 from pydantic import BaseModel, Field
+
 from crewai.tools import BaseTool
 
 
@@ -34,16 +37,8 @@ class WeaviateVectorSearchTool(BaseTool):
     args_schema: Type[BaseModel] = WeaviateToolSchema
     query: Optional[str] = None
 
-    vectorizer: Optional[Vectorizers] = Field(
-        default=Configure.Vectorizer.text2vec_openai(
-            model="nomic-embed-text",
-        )
-    )
-    generative_model: Optional[str] = Field(
-        default=Configure.Generative.openai(
-            model="gpt-4o",
-        ),
-    )
+    vectorizer: Optional[Vectorizers] = None
+    generative_model: Optional[str] = None
     collection_name: Optional[str] = None
     limit: Optional[int] = Field(default=3)
     headers: Optional[dict] = Field(
@@ -58,6 +53,19 @@ class WeaviateVectorSearchTool(BaseTool):
         description="The API key for the Weaviate cluster",
     )
 
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        if WEAVIATE_AVAILABLE:
+            self.vectorizer = self.vectorizer or Configure.Vectorizer.text2vec_openai(
+                model="nomic-embed-text",
+            )
+            self.generative_model = (
+                self.generative_model
+                or Configure.Generative.openai(
+                    model="gpt-4o",
+                )
+            )
+
     def _run(self, query: str) -> str:
         if not WEAVIATE_AVAILABLE:
             raise ImportError(