diff --git a/docs/_static/llama-stack-spec.html b/docs/_static/llama-stack-spec.html
index f9e4bb38e..b49049a8a 100644
--- a/docs/_static/llama-stack-spec.html
+++ b/docs/_static/llama-stack-spec.html
@@ -11468,6 +11468,32 @@
                     "ttl_seconds": {
                         "type": "integer",
                         "description": "The time to live of the chunks."
+                    },
+                    "params": {
+                        "type": "object",
+                        "additionalProperties": {
+                            "oneOf": [
+                                {
+                                    "type": "null"
+                                },
+                                {
+                                    "type": "boolean"
+                                },
+                                {
+                                    "type": "number"
+                                },
+                                {
+                                    "type": "string"
+                                },
+                                {
+                                    "type": "array"
+                                },
+                                {
+                                    "type": "object"
+                                }
+                            ]
+                        },
+                        "description": "Optional parameters for the insertion operation, such as distance_metric for vector databases."
                     }
                 },
                 "additionalProperties": false,
diff --git a/docs/_static/llama-stack-spec.yaml b/docs/_static/llama-stack-spec.yaml
index 9175c97fc..ad76e5535 100644
--- a/docs/_static/llama-stack-spec.yaml
+++ b/docs/_static/llama-stack-spec.yaml
@@ -8095,6 +8095,19 @@ components:
         ttl_seconds:
           type: integer
           description: The time to live of the chunks.
+        params:
+          type: object
+          additionalProperties:
+            oneOf:
+              - type: 'null'
+              - type: boolean
+              - type: number
+              - type: string
+              - type: array
+              - type: object
+          description: >-
+            Optional parameters for the insertion operation, such as distance_metric
+            for vector databases.
       additionalProperties: false
       required:
         - vector_db_id
diff --git a/llama_stack/apis/vector_io/vector_io.py b/llama_stack/apis/vector_io/vector_io.py
index 2d4131315..a033cd90f 100644
--- a/llama_stack/apis/vector_io/vector_io.py
+++ b/llama_stack/apis/vector_io/vector_io.py
@@ -306,6 +306,7 @@ class VectorIO(Protocol):
         vector_db_id: str,
         chunks: list[Chunk],
         ttl_seconds: int | None = None,
+        params: dict[str, Any] | None = None,
     ) -> None:
         """Insert chunks into a vector database.
 
@@ -315,6 +316,7 @@ class VectorIO(Protocol):
             If `metadata` is provided, you configure how Llama Stack formats the chunk during generation.
             If `embedding` is not provided, it will be computed later.
         :param ttl_seconds: The time to live of the chunks.
+        :param params: Optional parameters for the insertion operation, such as distance_metric for vector databases.
         """
         ...
 
diff --git a/llama_stack/providers/inline/vector_io/faiss/faiss.py b/llama_stack/providers/inline/vector_io/faiss/faiss.py
index 355750b25..98200e733 100644
--- a/llama_stack/providers/inline/vector_io/faiss/faiss.py
+++ b/llama_stack/providers/inline/vector_io/faiss/faiss.py
@@ -96,7 +96,7 @@ class FaissIndex(EmbeddingIndex):
 
         await self.kvstore.delete(f"{FAISS_INDEX_PREFIX}{self.bank_id}")
 
-    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray):
+    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray, metadata: dict[str, Any] | None = None):
         # Add dimension check
         embedding_dim = embeddings.shape[1] if len(embeddings.shape) > 1 else embeddings.shape[0]
         if embedding_dim != self.index.d:
@@ -234,6 +234,7 @@ class FaissVectorIOAdapter(OpenAIVectorStoreMixin, VectorIO, VectorDBsProtocolPr
         vector_db_id: str,
         chunks: list[Chunk],
         ttl_seconds: int | None = None,
+        params: dict[str, Any] | None = None,
     ) -> None:
         index = self.cache.get(vector_db_id)
         if index is None:
diff --git a/llama_stack/providers/inline/vector_io/qdrant/config.py b/llama_stack/providers/inline/vector_io/qdrant/config.py
index 61d026984..7cc91d918 100644
--- a/llama_stack/providers/inline/vector_io/qdrant/config.py
+++ b/llama_stack/providers/inline/vector_io/qdrant/config.py
@@ -5,7 +5,7 @@
 # the root directory of this source tree.
 
 
-from typing import Any, Literal
+from typing import Any
 
 from pydantic import BaseModel
 
@@ -15,7 +15,6 @@ from llama_stack.schema_utils import json_schema_type
 @json_schema_type
 class QdrantVectorIOConfig(BaseModel):
     path: str
-    distance_metric: Literal["COSINE", "DOT", "EUCLID", "MANHATTAN"] = "COSINE"
 
     @classmethod
     def sample_run_config(cls, __distro_dir__: str) -> dict[str, Any]:
diff --git a/llama_stack/providers/inline/vector_io/sqlite_vec/sqlite_vec.py b/llama_stack/providers/inline/vector_io/sqlite_vec/sqlite_vec.py
index 7e977635a..58bf8fa8c 100644
--- a/llama_stack/providers/inline/vector_io/sqlite_vec/sqlite_vec.py
+++ b/llama_stack/providers/inline/vector_io/sqlite_vec/sqlite_vec.py
@@ -178,7 +178,9 @@ class SQLiteVecIndex(EmbeddingIndex):
 
         await asyncio.to_thread(_drop_tables)
 
-    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray, batch_size: int = 500):
+    async def add_chunks(
+        self, chunks: list[Chunk], embeddings: NDArray, metadata: dict[str, Any] | None = None, batch_size: int = 500
+    ):
         """
         Add new chunks along with their embeddings using batch inserts.
         For each chunk, we insert its JSON into the metadata table and then insert its
@@ -729,7 +731,13 @@ class SQLiteVecVectorIOAdapter(OpenAIVectorStoreMixin, VectorIO, VectorDBsProtoc
 
         await asyncio.to_thread(_delete)
 
-    async def insert_chunks(self, vector_db_id: str, chunks: list[Chunk], ttl_seconds: int | None = None) -> None:
+    async def insert_chunks(
+        self,
+        vector_db_id: str,
+        chunks: list[Chunk],
+        ttl_seconds: int | None = None,
+        params: dict[str, Any] | None = None,
+    ) -> None:
         if vector_db_id not in self.cache:
             raise ValueError(f"Vector DB {vector_db_id} not found. Found: {list(self.cache.keys())}")
         # The VectorDBWithIndex helper is expected to compute embeddings via the inference_api
diff --git a/llama_stack/providers/remote/vector_io/chroma/chroma.py b/llama_stack/providers/remote/vector_io/chroma/chroma.py
index 3bef39e9c..cc38553ff 100644
--- a/llama_stack/providers/remote/vector_io/chroma/chroma.py
+++ b/llama_stack/providers/remote/vector_io/chroma/chroma.py
@@ -55,7 +55,7 @@ class ChromaIndex(EmbeddingIndex):
         self.client = client
         self.collection = collection
 
-    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray):
+    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray, metadata: dict[str, Any] | None = None):
         assert len(chunks) == len(embeddings), (
             f"Chunk length {len(chunks)} does not match embedding length {len(embeddings)}"
         )
diff --git a/llama_stack/providers/remote/vector_io/milvus/milvus.py b/llama_stack/providers/remote/vector_io/milvus/milvus.py
index 182227a85..f697579fd 100644
--- a/llama_stack/providers/remote/vector_io/milvus/milvus.py
+++ b/llama_stack/providers/remote/vector_io/milvus/milvus.py
@@ -53,7 +53,7 @@ class MilvusIndex(EmbeddingIndex):
         if await asyncio.to_thread(self.client.has_collection, self.collection_name):
             await asyncio.to_thread(self.client.drop_collection, collection_name=self.collection_name)
 
-    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray):
+    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray, metadata: dict[str, Any] | None = None):
         assert len(chunks) == len(embeddings), (
             f"Chunk length {len(chunks)} does not match embedding length {len(embeddings)}"
         )
diff --git a/llama_stack/providers/remote/vector_io/pgvector/pgvector.py b/llama_stack/providers/remote/vector_io/pgvector/pgvector.py
index c3cdef9b8..96f16146e 100644
--- a/llama_stack/providers/remote/vector_io/pgvector/pgvector.py
+++ b/llama_stack/providers/remote/vector_io/pgvector/pgvector.py
@@ -88,7 +88,7 @@ class PGVectorIndex(EmbeddingIndex):
             """
             )
 
-    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray):
+    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray, metadata: dict[str, Any] | None = None):
         assert len(chunks) == len(embeddings), (
             f"Chunk length {len(chunks)} does not match embedding length {len(embeddings)}"
         )
diff --git a/llama_stack/providers/remote/vector_io/qdrant/config.py b/llama_stack/providers/remote/vector_io/qdrant/config.py
index 0d8e08663..314d3f5f1 100644
--- a/llama_stack/providers/remote/vector_io/qdrant/config.py
+++ b/llama_stack/providers/remote/vector_io/qdrant/config.py
@@ -4,7 +4,7 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-from typing import Any, Literal
+from typing import Any
 
 from pydantic import BaseModel
 
@@ -23,7 +23,6 @@ class QdrantVectorIOConfig(BaseModel):
     prefix: str | None = None
     timeout: int | None = None
     host: str | None = None
-    distance_metric: Literal["COSINE", "DOT", "EUCLID", "MANHATTAN"] = "COSINE"
 
     @classmethod
     def sample_run_config(cls, **kwargs: Any) -> dict[str, Any]:
diff --git a/llama_stack/providers/remote/vector_io/qdrant/qdrant.py b/llama_stack/providers/remote/vector_io/qdrant/qdrant.py
index 8787a4900..3a73c57cd 100644
--- a/llama_stack/providers/remote/vector_io/qdrant/qdrant.py
+++ b/llama_stack/providers/remote/vector_io/qdrant/qdrant.py
@@ -18,17 +18,7 @@ from llama_stack.apis.vector_dbs import VectorDB
 from llama_stack.apis.vector_io import (
     Chunk,
     QueryChunksResponse,
-    SearchRankingOptions,
     VectorIO,
-    VectorStoreChunkingStrategy,
-    VectorStoreDeleteResponse,
-    VectorStoreFileContentsResponse,
-    VectorStoreFileObject,
-    VectorStoreFileStatus,
-    VectorStoreListFilesResponse,
-    VectorStoreListResponse,
-    VectorStoreObject,
-    VectorStoreSearchResponsePage,
 )
 from llama_stack.providers.datatypes import Api, VectorDBsProtocolPrivate
 from llama_stack.providers.inline.vector_io.qdrant import QdrantVectorIOConfig as InlineQdrantVectorIOConfig
@@ -57,24 +47,41 @@ def convert_id(_id: str) -> str:
 
 
 class QdrantIndex(EmbeddingIndex):
-    def __init__(self, client: AsyncQdrantClient, collection_name: str, distance_metric: str = "COSINE"):
+    def __init__(self, client: AsyncQdrantClient, collection_name: str):
         self.client = client
         self.collection_name = collection_name
-        self.distance_metric = distance_metric
+        self._distance_metric = None  # Will be set when collection is created
 
-    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray):
+    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray, metadata: dict[str, Any] | None = None):
         assert len(chunks) == len(embeddings), (
             f"Chunk length {len(chunks)} does not match embedding length {len(embeddings)}"
         )
 
+        # Extract distance_metric from metadata if provided, default to COSINE
+        distance_metric = "COSINE"  # Default
+        if metadata is not None and "distance_metric" in metadata:
+            distance_metric = metadata["distance_metric"]
+
         if not await self.client.collection_exists(self.collection_name):
-            # Get distance metric, defaulting to COSINE
-            distance = getattr(models.Distance, self.distance_metric, models.Distance.COSINE)
+            # Create collection with the specified distance metric
+            distance = getattr(models.Distance, distance_metric, models.Distance.COSINE)
+            self._distance_metric = distance_metric
 
             await self.client.create_collection(
                 self.collection_name,
                 vectors_config=models.VectorParams(size=len(embeddings[0]), distance=distance),
             )
+        else:
+            # Collection already exists, warn if different distance metric was requested
+            if self._distance_metric is None:
+                # For now, assume COSINE as default since we can't easily extract it from collection info
+                self._distance_metric = "COSINE"
+
+            if self._distance_metric != distance_metric:
+                log.warning(
+                    f"Collection {self.collection_name} was created with distance metric '{self._distance_metric}', "
+                    f"but '{distance_metric}' was requested. Using existing distance metric."
+                )
 
         points = []
         for _i, (chunk, embedding) in enumerate(zip(chunks, embeddings, strict=False)):
@@ -90,6 +97,7 @@ class QdrantIndex(EmbeddingIndex):
         await self.client.upsert(collection_name=self.collection_name, points=points)
 
     async def query_vector(self, embedding: NDArray, k: int, score_threshold: float) -> QueryChunksResponse:
+        # Distance metric is set at collection creation and cannot be changed
         results = (
             await self.client.query_points(
                 collection_name=self.collection_name,
@@ -170,9 +178,8 @@ class QdrantVectorIOAdapter(OpenAIVectorStoreMixin, VectorIO, VectorDBsProtocolP
 
         # Create metadata collection if it doesn't exist
         if not await self.client.collection_exists(metadata_collection):
-            # Get distance metric from config, defaulting to COSINE for backward compatibility
-            distance_metric = getattr(self.config, "distance_metric", "COSINE")
-            distance = getattr(models.Distance, distance_metric, models.Distance.COSINE)
+            # Use default distance metric for metadata collection
+            distance = models.Distance.COSINE
 
             await self.client.create_collection(
                 collection_name=metadata_collection,
@@ -226,13 +233,101 @@ class QdrantVectorIOAdapter(OpenAIVectorStoreMixin, VectorIO, VectorDBsProtocolP
                 collection_name=metadata_collection, points_selector=models.PointIdsList(points=[convert_id(store_id)])
             )
 
+    async def _save_openai_vector_store_file(
+        self, store_id: str, file_id: str, file_info: dict[str, Any], file_contents: list[dict[str, Any]]
+    ) -> None:
+        """Save vector store file metadata to Qdrant collection metadata."""
+        # Store file metadata in a special collection for vector store file metadata
+        file_metadata_collection = f"{OPENAI_VECTOR_STORES_METADATA_COLLECTION}_files"
+
+        # Create file metadata collection if it doesn't exist
+        if not await self.client.collection_exists(file_metadata_collection):
+            distance = models.Distance.COSINE
+            await self.client.create_collection(
+                collection_name=file_metadata_collection,
+                vectors_config=models.VectorParams(size=1, distance=distance),
+            )
+
+        # Store file metadata as a point with dummy vector
+        file_key = f"{store_id}:{file_id}"
+        await self.client.upsert(
+            collection_name=file_metadata_collection,
+            points=[
+                models.PointStruct(
+                    id=convert_id(file_key),
+                    vector=[0.0],  # Dummy vector
+                    payload={"file_info": file_info, "file_contents": file_contents},
+                )
+            ],
+        )
+
+    async def _load_openai_vector_store_file(self, store_id: str, file_id: str) -> dict[str, Any]:
+        """Load vector store file metadata from Qdrant."""
+        file_metadata_collection = f"{OPENAI_VECTOR_STORES_METADATA_COLLECTION}_files"
+
+        if not await self.client.collection_exists(file_metadata_collection):
+            return {}
+
+        file_key = f"{store_id}:{file_id}"
+        points = await self.client.retrieve(
+            collection_name=file_metadata_collection,
+            ids=[convert_id(file_key)],
+            with_payload=True,
+        )
+
+        if points and points[0].payload and "file_info" in points[0].payload:
+            return points[0].payload["file_info"]
+        return {}
+
+    async def _load_openai_vector_store_file_contents(self, store_id: str, file_id: str) -> list[dict[str, Any]]:
+        """Load vector store file contents from Qdrant."""
+        file_metadata_collection = f"{OPENAI_VECTOR_STORES_METADATA_COLLECTION}_files"
+
+        if not await self.client.collection_exists(file_metadata_collection):
+            return []
+
+        file_key = f"{store_id}:{file_id}"
+        points = await self.client.retrieve(
+            collection_name=file_metadata_collection,
+            ids=[convert_id(file_key)],
+            with_payload=True,
+        )
+
+        if points and points[0].payload and "file_contents" in points[0].payload:
+            return points[0].payload["file_contents"]
+        return []
+
+    async def _update_openai_vector_store_file(self, store_id: str, file_id: str, file_info: dict[str, Any]) -> None:
+        """Update vector store file metadata in Qdrant."""
+        file_metadata_collection = f"{OPENAI_VECTOR_STORES_METADATA_COLLECTION}_files"
+
+        if not await self.client.collection_exists(file_metadata_collection):
+            return
+
+        # Get existing file contents
+        existing_contents = await self._load_openai_vector_store_file_contents(store_id, file_id)
+
+        # Update with new file info but keep existing contents
+        await self._save_openai_vector_store_file(store_id, file_id, file_info, existing_contents)
+
+    async def _delete_openai_vector_store_file_from_storage(self, store_id: str, file_id: str) -> None:
+        """Delete vector store file metadata from Qdrant."""
+        file_metadata_collection = f"{OPENAI_VECTOR_STORES_METADATA_COLLECTION}_files"
+
+        if await self.client.collection_exists(file_metadata_collection):
+            file_key = f"{store_id}:{file_id}"
+            await self.client.delete(
+                collection_name=file_metadata_collection,
+                points_selector=models.PointIdsList(points=[convert_id(file_key)]),
+            )
+
     async def register_vector_db(
         self,
         vector_db: VectorDB,
     ) -> None:
         index = VectorDBWithIndex(
             vector_db=vector_db,
-            index=QdrantIndex(self.client, vector_db.identifier, self.config.distance_metric),
+            index=QdrantIndex(self.client, vector_db.identifier),
             inference_api=self.inference_api,
         )
 
@@ -253,9 +348,7 @@ class QdrantVectorIOAdapter(OpenAIVectorStoreMixin, VectorIO, VectorDBsProtocolP
 
         index = VectorDBWithIndex(
             vector_db=vector_db,
-            index=QdrantIndex(
-                client=self.client, collection_name=vector_db.identifier, distance_metric=self.config.distance_metric
-            ),
+            index=QdrantIndex(client=self.client, collection_name=vector_db.identifier),
             inference_api=self.inference_api,
         )
         self.cache[vector_db_id] = index
@@ -266,12 +359,23 @@ class QdrantVectorIOAdapter(OpenAIVectorStoreMixin, VectorIO, VectorDBsProtocolP
         vector_db_id: str,
         chunks: list[Chunk],
         ttl_seconds: int | None = None,
+        params: dict[str, Any] | None = None,
     ) -> None:
         index = await self._get_and_cache_vector_db_index(vector_db_id)
         if not index:
             raise ValueError(f"Vector DB {vector_db_id} not found")
 
-        await index.insert_chunks(chunks)
+        # Extract distance_metric from params if provided
+        distance_metric = None
+        if params is not None:
+            distance_metric = params.get("distance_metric")
+
+        # Create metadata dict with distance_metric if provided
+        metadata = None
+        if distance_metric is not None:
+            metadata = {"distance_metric": distance_metric}
+
+        await index.insert_chunks(chunks, metadata=metadata)
 
     async def query_chunks(
         self,
@@ -284,108 +388,3 @@ class QdrantVectorIOAdapter(OpenAIVectorStoreMixin, VectorIO, VectorDBsProtocolP
             raise ValueError(f"Vector DB {vector_db_id} not found")
 
         return await index.query_chunks(query, params)
-
-    async def openai_create_vector_store(
-        self,
-        name: str,
-        file_ids: list[str] | None = None,
-        expires_after: dict[str, Any] | None = None,
-        chunking_strategy: dict[str, Any] | None = None,
-        metadata: dict[str, Any] | None = None,
-        embedding_model: str | None = None,
-        embedding_dimension: int | None = 384,
-        provider_id: str | None = None,
-        provider_vector_db_id: str | None = None,
-    ) -> VectorStoreObject:
-        raise NotImplementedError("OpenAI Vector Stores API is not supported in Qdrant")
-
-    async def openai_list_vector_stores(
-        self,
-        limit: int | None = 20,
-        order: str | None = "desc",
-        after: str | None = None,
-        before: str | None = None,
-    ) -> VectorStoreListResponse:
-        raise NotImplementedError("OpenAI Vector Stores API is not supported in Qdrant")
-
-    async def openai_retrieve_vector_store(
-        self,
-        vector_store_id: str,
-    ) -> VectorStoreObject:
-        raise NotImplementedError("OpenAI Vector Stores API is not supported in Qdrant")
-
-    async def openai_update_vector_store(
-        self,
-        vector_store_id: str,
-        name: str | None = None,
-        expires_after: dict[str, Any] | None = None,
-        metadata: dict[str, Any] | None = None,
-    ) -> VectorStoreObject:
-        raise NotImplementedError("OpenAI Vector Stores API is not supported in Qdrant")
-
-    async def openai_delete_vector_store(
-        self,
-        vector_store_id: str,
-    ) -> VectorStoreDeleteResponse:
-        raise NotImplementedError("OpenAI Vector Stores API is not supported in Qdrant")
-
-    async def openai_search_vector_store(
-        self,
-        vector_store_id: str,
-        query: str | list[str],
-        filters: dict[str, Any] | None = None,
-        max_num_results: int | None = 10,
-        ranking_options: SearchRankingOptions | None = None,
-        rewrite_query: bool | None = False,
-        search_mode: str | None = "vector",
-    ) -> VectorStoreSearchResponsePage:
-        raise NotImplementedError("OpenAI Vector Stores API is not supported in Qdrant")
-
-    async def openai_attach_file_to_vector_store(
-        self,
-        vector_store_id: str,
-        file_id: str,
-        attributes: dict[str, Any] | None = None,
-        chunking_strategy: VectorStoreChunkingStrategy | None = None,
-    ) -> VectorStoreFileObject:
-        raise NotImplementedError("OpenAI Vector Stores API is not supported in Qdrant")
-
-    async def openai_list_files_in_vector_store(
-        self,
-        vector_store_id: str,
-        limit: int | None = 20,
-        order: str | None = "desc",
-        after: str | None = None,
-        before: str | None = None,
-        filter: VectorStoreFileStatus | None = None,
-    ) -> VectorStoreListFilesResponse:
-        raise NotImplementedError("OpenAI Vector Stores API is not supported in Qdrant")
-
-    async def openai_retrieve_vector_store_file(
-        self,
-        vector_store_id: str,
-        file_id: str,
-    ) -> VectorStoreFileObject:
-        raise NotImplementedError("OpenAI Vector Stores API is not supported in Qdrant")
-
-    async def openai_retrieve_vector_store_file_contents(
-        self,
-        vector_store_id: str,
-        file_id: str,
-    ) -> VectorStoreFileContentsResponse:
-        raise NotImplementedError("OpenAI Vector Stores API is not supported in Qdrant")
-
-    async def openai_update_vector_store_file(
-        self,
-        vector_store_id: str,
-        file_id: str,
-        attributes: dict[str, Any] | None = None,
-    ) -> VectorStoreFileObject:
-        raise NotImplementedError("OpenAI Vector Stores API is not supported in Qdrant")
-
-    async def openai_delete_vector_store_file(
-        self,
-        vector_store_id: str,
-        file_id: str,
-    ) -> VectorStoreFileObject:
-        raise NotImplementedError("OpenAI Vector Stores API is not supported in Qdrant")
diff --git a/llama_stack/providers/remote/vector_io/weaviate/weaviate.py b/llama_stack/providers/remote/vector_io/weaviate/weaviate.py
index c63dd70c6..5ecfce31d 100644
--- a/llama_stack/providers/remote/vector_io/weaviate/weaviate.py
+++ b/llama_stack/providers/remote/vector_io/weaviate/weaviate.py
@@ -33,7 +33,7 @@ class WeaviateIndex(EmbeddingIndex):
         self.client = client
         self.collection_name = collection_name
 
-    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray):
+    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray, metadata: dict[str, Any] | None = None):
         assert len(chunks) == len(embeddings), (
             f"Chunk length {len(chunks)} does not match embedding length {len(embeddings)}"
         )
diff --git a/llama_stack/providers/utils/memory/vector_store.py b/llama_stack/providers/utils/memory/vector_store.py
index ab204a75a..225dda317 100644
--- a/llama_stack/providers/utils/memory/vector_store.py
+++ b/llama_stack/providers/utils/memory/vector_store.py
@@ -214,7 +214,7 @@ def _validate_embedding(embedding: NDArray, index: int, expected_dimension: int)
 
 class EmbeddingIndex(ABC):
     @abstractmethod
-    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray):
+    async def add_chunks(self, chunks: list[Chunk], embeddings: NDArray, metadata: dict[str, Any] | None = None):
         raise NotImplementedError()
 
     @abstractmethod
@@ -251,6 +251,7 @@ class VectorDBWithIndex:
     async def insert_chunks(
         self,
         chunks: list[Chunk],
+        distance_metric: str | None = None,
     ) -> None:
         chunks_to_embed = []
         for i, c in enumerate(chunks):
@@ -271,7 +272,13 @@ class VectorDBWithIndex:
                 c.embedding = embedding
 
         embeddings = np.array([c.embedding for c in chunks], dtype=np.float32)
-        await self.index.add_chunks(chunks, embeddings)
+
+        # Create metadata dict with distance_metric if provided
+        metadata = None
+        if distance_metric is not None:
+            metadata = {"distance_metric": distance_metric}
+
+        await self.index.add_chunks(chunks, embeddings, metadata=metadata)
 
     async def query_chunks(
         self,