diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0e33b9c..aaf77ed 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+- Return model dumps of DB schema objects.
+
 ### Added
 - LLM evaluation logic
 - Integrated Alembic for managing chat history migrations
diff --git a/src/neuroagent/cell_types.py b/src/neuroagent/cell_types.py
index df84d38..9c91e32 100644
--- a/src/neuroagent/cell_types.py
+++ b/src/neuroagent/cell_types.py
@@ -17,7 +17,7 @@ class CellTypesMeta:
     """
 
     def __init__(self) -> None:
-        self.name_: dict[str, str] = {}
+        self.name_: dict[Any, Any | None] = {}
         self.descendants_ids: dict[str, set[str]] = {}
 
     def descendants(self, ids: str | set[str]) -> set[str]:
diff --git a/swarm_copy/cell_types.py b/swarm_copy/cell_types.py
index df84d38..9c91e32 100644
--- a/swarm_copy/cell_types.py
+++ b/swarm_copy/cell_types.py
@@ -17,7 +17,7 @@ class CellTypesMeta:
     """
 
     def __init__(self) -> None:
-        self.name_: dict[str, str] = {}
+        self.name_: dict[Any, Any | None] = {}
         self.descendants_ids: dict[str, set[str]] = {}
 
     def descendants(self, ids: str | set[str]) -> set[str]:
diff --git a/swarm_copy/tools/bluenaas_memodel_getall.py b/swarm_copy/tools/bluenaas_memodel_getall.py
index a7cee19..6c95c0e 100644
--- a/swarm_copy/tools/bluenaas_memodel_getall.py
+++ b/swarm_copy/tools/bluenaas_memodel_getall.py
@@ -1,7 +1,7 @@
 """BlueNaaS single cell stimulation, simulation and synapse placement tool."""
 
 import logging
-from typing import ClassVar, Literal
+from typing import Any, ClassVar, Literal
 
 from pydantic import BaseModel, Field
 
@@ -46,7 +46,7 @@ class MEModelGetAllTool(BaseTool):
     metadata: MEModelGetAllMetadata
     input_schema: InputMEModelGetAll
 
-    async def arun(self) -> PaginatedResponseUnionMEModelResponseSynaptomeModelResponse:
+    async def arun(self) -> dict[str, Any]:
         """Run the MEModelGetAll tool."""
         logger.info(
             f"Running MEModelGetAll tool with inputs {self.input_schema.model_dump()}"
@@ -61,7 +61,6 @@ async def arun(self) -> PaginatedResponseUnionMEModelResponseSynaptomeModelRespo
             },
             headers={"Authorization": f"Bearer {self.metadata.token}"},
         )
-        breakpoint()
         return PaginatedResponseUnionMEModelResponseSynaptomeModelResponse(
             **response.json()
-        )
+        ).model_dump()
diff --git a/swarm_copy/tools/bluenaas_memodel_getone.py b/swarm_copy/tools/bluenaas_memodel_getone.py
index f84acfa..2f36f64 100644
--- a/swarm_copy/tools/bluenaas_memodel_getone.py
+++ b/swarm_copy/tools/bluenaas_memodel_getone.py
@@ -1,7 +1,7 @@
 """BlueNaaS single cell stimulation, simulation and synapse placement tool."""
 
 import logging
-from typing import ClassVar
+from typing import Any, ClassVar
 from urllib.parse import quote_plus
 
 from pydantic import BaseModel, Field
@@ -38,7 +38,7 @@ class MEModelGetOneTool(BaseTool):
     metadata: MEModelGetOneMetadata
     input_schema: InputMEModelGetOne
 
-    async def arun(self) -> MEModelResponse:
+    async def arun(self) -> dict[str, Any]:
         """Run the MEModelGetOne tool."""
         logger.info(
             f"Running MEModelGetOne tool with inputs {self.input_schema.model_dump()}"
@@ -49,4 +49,4 @@ async def arun(self) -> MEModelResponse:
             headers={"Authorization": f"Bearer {self.metadata.token}"},
         )
 
-        return MEModelResponse(**response.json())
+        return MEModelResponse(**response.json()).model_dump()
diff --git a/swarm_copy/tools/bluenaas_scs_getall.py b/swarm_copy/tools/bluenaas_scs_getall.py
index 95897dc..533ed7f 100644
--- a/swarm_copy/tools/bluenaas_scs_getall.py
+++ b/swarm_copy/tools/bluenaas_scs_getall.py
@@ -1,7 +1,7 @@
 """BlueNaaS single cell stimulation, simulation and synapse placement tool."""
 
 import logging
-from typing import ClassVar, Literal
+from typing import Any, ClassVar, Literal
 
 from pydantic import BaseModel, Field
 
@@ -47,7 +47,7 @@ class SCSGetAllTool(BaseTool):
     metadata: SCSGetAllMetadata
     input_schema: InputSCSGetAll
 
-    async def arun(self) -> PaginatedResponseSimulationDetailsResponse:
+    async def arun(self) -> dict[str, Any]:
         """Run the SCSGetAll tool."""
         logger.info(
             f"Running SCSGetAll tool with inputs {self.input_schema.model_dump()}"
@@ -63,4 +63,6 @@ async def arun(self) -> PaginatedResponseSimulationDetailsResponse:
             headers={"Authorization": f"Bearer {self.metadata.token}"},
         )
 
-        return PaginatedResponseSimulationDetailsResponse(**response.json())
+        return PaginatedResponseSimulationDetailsResponse(
+            **response.json()
+        ).model_dump()
diff --git a/swarm_copy/tools/bluenaas_scs_getone.py b/swarm_copy/tools/bluenaas_scs_getone.py
index 4957be9..2575682 100644
--- a/swarm_copy/tools/bluenaas_scs_getone.py
+++ b/swarm_copy/tools/bluenaas_scs_getone.py
@@ -1,7 +1,7 @@
 """BlueNaaS single cell stimulation, simulation and synapse placement tool."""
 
 import logging
-from typing import ClassVar
+from typing import Any, ClassVar
 
 from pydantic import BaseModel, Field
 
@@ -39,7 +39,7 @@ class SCSGetOneTool(BaseTool):
     metadata: SCSGetOneMetadata
     input_schema: InputSCSGetOne
 
-    async def arun(self) -> SimulationDetailsResponse:
+    async def arun(self) -> dict[str, Any]:
         """Run the SCSGetOne tool."""
         logger.info(
             f"Running SCSGetOne tool with inputs {self.input_schema.model_dump()}"
@@ -50,4 +50,4 @@ async def arun(self) -> SimulationDetailsResponse:
             headers={"Authorization": f"Bearer {self.metadata.token}"},
         )
 
-        return SimulationDetailsResponse(**response.json())
+        return SimulationDetailsResponse(**response.json()).model_dump()
diff --git a/swarm_copy/tools/bluenaas_scs_post.py b/swarm_copy/tools/bluenaas_scs_post.py
index 6c8e154..7e3144c 100644
--- a/swarm_copy/tools/bluenaas_scs_post.py
+++ b/swarm_copy/tools/bluenaas_scs_post.py
@@ -94,7 +94,7 @@ class SCSPostTool(BaseTool):
     metadata: SCSPostMetadata
     input_schema: InputSCSPost
 
-    async def arun(self) -> SCSPostOutput:
+    async def arun(self) -> dict[str, Any]:
         """Run the SCSPost tool."""
         logger.info(
             f"Running SCSPost tool with inputs {self.input_schema.model_dump()}"
@@ -126,7 +126,7 @@ async def arun(self) -> SCSPostOutput:
             status=json_response["status"],
             name=json_response["name"],
             error=json_response["error"],
-        )
+        ).model_dump()
 
     @staticmethod
     def create_json_api(
diff --git a/swarm_copy/tools/electrophys_tool.py b/swarm_copy/tools/electrophys_tool.py
index 00673c1..2984836 100644
--- a/swarm_copy/tools/electrophys_tool.py
+++ b/swarm_copy/tools/electrophys_tool.py
@@ -194,7 +194,7 @@ class ElectrophysFeatureTool(BaseTool):
     input_schema: ElectrophysInput
     metadata: ElectrophysMetadata
 
-    async def arun(self) -> FeatureOutput:
+    async def arun(self) -> dict[str, Any]:
         """Give features about trace."""
         logger.info(
             f"Entering electrophys tool. Inputs: {self.input_schema.trace_id=}, {self.input_schema.calculated_feature=},"
@@ -329,4 +329,4 @@ async def arun(self) -> FeatureOutput:
                 )
         return FeatureOutput(
             brain_region=metadata.brain_region, feature_dict=output_features
-        )
+        ).model_dump()
diff --git a/swarm_copy/tools/get_morpho_tool.py b/swarm_copy/tools/get_morpho_tool.py
index dc8d4a6..45c72bb 100644
--- a/swarm_copy/tools/get_morpho_tool.py
+++ b/swarm_copy/tools/get_morpho_tool.py
@@ -70,7 +70,7 @@ class GetMorphoTool(BaseTool):
     input_schema: GetMorphoInput
     metadata: GetMorphoMetadata
 
-    async def arun(self) -> list[KnowledgeGraphOutput]:
+    async def arun(self) -> list[dict[str, Any]]:
         """From a brain region ID, extract morphologies.
 
         Returns
@@ -175,7 +175,7 @@ def create_query(
         return entire_query
 
     @staticmethod
-    def _process_output(output: Any) -> list[KnowledgeGraphOutput]:
+    def _process_output(output: Any) -> list[dict[str, Any]]:
         """Process output to fit the KnowledgeGraphOutput pydantic class defined above.
 
         Parameters
@@ -211,7 +211,7 @@ def _process_output(output: Any) -> list[KnowledgeGraphOutput]:
                     if "subjectAge" in res["_source"]
                     else None
                 ),
-            )
+            ).model_dump()
             for res in output["hits"]["hits"]
         ]
         return formatted_output
diff --git a/swarm_copy/tools/kg_morpho_features_tool.py b/swarm_copy/tools/kg_morpho_features_tool.py
index 24eeac8..7298636 100644
--- a/swarm_copy/tools/kg_morpho_features_tool.py
+++ b/swarm_copy/tools/kg_morpho_features_tool.py
@@ -186,7 +186,7 @@ class KGMorphoFeatureTool(BaseTool):
     input_schema: KGMorphoFeatureInput
     metadata: KGMorphoFeatureMetadata
 
-    async def arun(self) -> list[KGMorphoFeatureOutput]:
+    async def arun(self) -> list[dict[str, Any]]:
         """Run the tool async.
 
         Returns
@@ -319,7 +319,7 @@ def create_query(
         return entire_query
 
     @staticmethod
-    def _process_output(output: Any) -> list[KGMorphoFeatureOutput]:
+    def _process_output(output: Any) -> list[dict[str, Any]]:
         """Process output.
 
         Parameters
@@ -347,7 +347,7 @@ def _process_output(output: Any) -> list[KGMorphoFeatureOutput]:
                     morphology_id=morpho_source["neuronMorphology"]["@id"],
                     morphology_name=morpho_source["neuronMorphology"].get("name"),
                     features=feature_output,
-                )
+                ).model_dump()
             )
 
         return formatted_output
diff --git a/swarm_copy/tools/literature_search_tool.py b/swarm_copy/tools/literature_search_tool.py
index 99880b9..92ebf7d 100644
--- a/swarm_copy/tools/literature_search_tool.py
+++ b/swarm_copy/tools/literature_search_tool.py
@@ -61,7 +61,7 @@ class LiteratureSearchTool(BaseTool):
     input_schema: LiteratureSearchInput
     metadata: LiteratureSearchMetadata
 
-    async def arun(self) -> list[ParagraphMetadata]:
+    async def arun(self) -> list[dict[str, Any]]:
         """Async search the scientific literature and returns citations.
 
         Returns
@@ -91,7 +91,7 @@ async def arun(self) -> list[ParagraphMetadata]:
         return self._process_output(response.json())
 
     @staticmethod
-    def _process_output(output: list[dict[str, Any]]) -> list[ParagraphMetadata]:
+    def _process_output(output: list[dict[str, Any]]) -> list[dict[str, Any]]:
         """Process output."""
         paragraphs_metadata = [
             ParagraphMetadata(
@@ -101,7 +101,7 @@ def _process_output(output: list[dict[str, Any]]) -> list[ParagraphMetadata]:
                 section=paragraph["section"],
                 article_doi=paragraph["article_doi"],
                 journal_issn=paragraph["journal_issn"],
-            )
+            ).model_dump()
             for paragraph in output
         ]
         return paragraphs_metadata
diff --git a/swarm_copy/tools/morphology_features_tool.py b/swarm_copy/tools/morphology_features_tool.py
index 00bd349..31b2548 100644
--- a/swarm_copy/tools/morphology_features_tool.py
+++ b/swarm_copy/tools/morphology_features_tool.py
@@ -52,7 +52,7 @@ class MorphologyFeatureTool(BaseTool):
     input_schema: MorphologyFeatureInput
     metadata: MorphologyFeatureMetadata
 
-    async def arun(self) -> list[MorphologyFeatureOutput]:
+    async def arun(self) -> list[dict[str, Any]]:
         """Give features about morphology."""
         logger.info(
             f"Entering morphology feature tool. Inputs: {self.input_schema.morphology_id=}"
@@ -71,7 +71,7 @@ async def arun(self) -> list[MorphologyFeatureOutput]:
         return [
             MorphologyFeatureOutput(
                 brain_region=metadata.brain_region, feature_dict=features
-            )
+            ).model_dump()
         ]
 
     def get_features(self, morphology_content: bytes, reader: str) -> dict[str, Any]:
diff --git a/swarm_copy/tools/resolve_entities_tool.py b/swarm_copy/tools/resolve_entities_tool.py
index 1264ac1..e6ab88d 100644
--- a/swarm_copy/tools/resolve_entities_tool.py
+++ b/swarm_copy/tools/resolve_entities_tool.py
@@ -1,7 +1,7 @@
 """Tool to resolve the brain region from natural english to a KG ID."""
 
 import logging
-from typing import ClassVar
+from typing import Any, ClassVar
 
 from pydantic import BaseModel, Field
 
@@ -86,14 +86,14 @@ class ResolveEntitiesTool(BaseTool):
 
     async def arun(
         self,
-    ) -> list[BRResolveOutput | MTypeResolveOutput | EtypeResolveOutput]:
+    ) -> list[dict[str, Any]]:
         """Given a brain region in natural language, resolve its ID."""
         logger.info(
             f"Entering Brain Region resolver tool. Inputs: {self.input_schema.brain_region=}, "
             f"{self.input_schema.mtype=}, {self.input_schema.etype=}"
         )
         # Prepare the output list.
-        output: list[BRResolveOutput | MTypeResolveOutput | EtypeResolveOutput] = []
+        output: list[dict[str, Any]] = []
 
         # First resolve the brain regions.
         brain_regions = await resolve_query(
@@ -108,7 +108,9 @@ async def arun(
         # Extend the resolved BRs.
         output.extend(
             [
-                BRResolveOutput(brain_region_name=br["label"], brain_region_id=br["id"])
+                BRResolveOutput(
+                    brain_region_name=br["label"], brain_region_id=br["id"]
+                ).model_dump()
                 for br in brain_regions
             ]
         )
@@ -127,7 +129,9 @@ async def arun(
             # Extend the resolved mtypes.
             output.extend(
                 [
-                    MTypeResolveOutput(mtype_name=mtype["label"], mtype_id=mtype["id"])
+                    MTypeResolveOutput(
+                        mtype_name=mtype["label"], mtype_id=mtype["id"]
+                    ).model_dump()
                     for mtype in mtypes
                 ]
             )
@@ -138,7 +142,7 @@ async def arun(
                 EtypeResolveOutput(
                     etype_name=self.input_schema.etype,
                     etype_id=ETYPE_IDS[self.input_schema.etype],
-                )
+                ).model_dump()
             )
 
         return output
diff --git a/swarm_copy/tools/traces_tool.py b/swarm_copy/tools/traces_tool.py
index 0434013..0703259 100644
--- a/swarm_copy/tools/traces_tool.py
+++ b/swarm_copy/tools/traces_tool.py
@@ -71,7 +71,7 @@ class GetTracesTool(BaseTool):
     input_schema: GetTracesInput
     metadata: GetTracesMetadata
 
-    async def arun(self) -> list[TracesOutput]:
+    async def arun(self) -> list[dict[str, Any]]:
         """From a brain region ID, extract traces."""
         logger.info(
             f"Entering get trace tool. Inputs: {self.input_schema.brain_region_id=}, {self.input_schema.etype_id=}"
@@ -153,7 +153,7 @@ def create_query(
         return entire_query
 
     @staticmethod
-    def _process_output(output: Any) -> list[TracesOutput]:
+    def _process_output(output: Any) -> list[dict[str, Any]]:
         """Process output to fit the TracesOutput pydantic class defined above.
 
         Parameters
@@ -190,7 +190,7 @@ def _process_output(output: Any) -> list[TracesOutput]:
                     if "subjectAge" in res["_source"]
                     else None
                 ),
-            )
+            ).model_dump()
             for res in output["hits"]["hits"]
         ]
         return results