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fix: filter extra fields from tool_use blocks to prevent Anthropic API rejection #247

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fix: filter extra fields from tool_use blocks to prevent Anthropic API rejection #247

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15 changes: 13 additions & 2 deletions stagehand/agent/anthropic_cua.py
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,8 @@


class AnthropicCUAClient(AgentClient):
ALLOWED_TOOL_USE_FIELDS = {"type", "id", "name", "input"}

ANTHROPIC_KEY_MAPPING = {
"return": "Enter",
"enter": "Enter",
Expand Down Expand Up @@ -283,6 +285,15 @@ def _format_initial_messages(
messages.append({"role": "user", "content": user_content})
return messages

def _sanitise_content_block(self, block_data: dict[str, Any]) -> dict[str, Any]:
if block_data.get("type") == "tool_use":
return {
k: v
for k, v in block_data.items()
if k in self.ALLOWED_TOOL_USE_FIELDS
}
return block_data

def _process_provider_response(
self, response: Any # Anthropic API response object
) -> tuple[Optional[AgentAction], Optional[str], bool, list[dict[str, Any]]]:
Expand All @@ -293,10 +304,10 @@ def _process_provider_response(

raw_assistant_content_blocks = []
if hasattr(response, "content") and isinstance(response.content, list):
# Serialize Pydantic models from response.content for history
try:
raw_assistant_content_blocks = [
block.model_dump() for block in response.content
self._sanitise_content_block(block.model_dump())
for block in response.content
]
except Exception as e:
self.logger.error(
Expand Down