diff --git a/CHANGELOG.md b/CHANGELOG.md
index a5c9434db..41524232c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## Unreleased
 
+- Bedrock: Support for tool calling on Nova models.
 - Bedrock: Support for custom `model_args` passed through to `session.Client`.
 - Inspect View: Various improvements to appearance of tool calls in transcript.
 - Bugfix: Proper handling of text find for eval raw JSON display
diff --git a/src/inspect_ai/model/_providers/bedrock.py b/src/inspect_ai/model/_providers/bedrock.py
index b576aefe2..ce06d02c9 100644
--- a/src/inspect_ai/model/_providers/bedrock.py
+++ b/src/inspect_ai/model/_providers/bedrock.py
@@ -680,7 +680,11 @@ def converse_tools(tools: list[ToolInfo]) -> list[ConverseTool] | None:
         tool_spec = ConverseToolSpec(
             name=tool.name,
             description=tool.description,
-            inputSchema={"json": tool.parameters.model_dump(exclude_none=True)},
+            inputSchema={
+                "json": tool.parameters.model_dump(
+                    exclude_none=True, exclude={"additionalProperties"}
+                )
+            },
         )
         result.append(ConverseTool(toolSpec=tool_spec))
     return result