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[MCP] Handle Ollama's deviation from the OpenAI tool streaming spec #3140

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[MCP] Handle Ollama's deviation from the OpenAI tool streaming spec #3140

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050ecbd
fix ollama
hanouticelina Jun 4, 2025
41011d2
style
hanouticelina Jun 4, 2025
23090a5
Merge branch 'main' into fix-ollama
hanouticelina Jun 4, 2025
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23 changes: 13 additions & 10 deletions src/huggingface_hub/inference/_mcp/mcp_client.py
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Original file line number Diff line number Diff line change
Expand Up @@ -286,16 +286,19 @@ async def process_single_turn_with_tools(
# Process tool calls
if delta.tool_calls:
for tool_call in delta.tool_calls:
# Aggregate chunks into tool calls
if tool_call.index not in final_tool_calls:
if (
tool_call.function.arguments is None or tool_call.function.arguments == "{}"
): # Corner case (depends on provider)
tool_call.function.arguments = ""
final_tool_calls[tool_call.index] = tool_call

elif tool_call.function.arguments:
final_tool_calls[tool_call.index].function.arguments += tool_call.function.arguments
idx = tool_call.index
# first chunk for this tool call
if idx not in final_tool_calls:
final_tool_calls[idx] = tool_call
if final_tool_calls[idx].function.arguments is None:
final_tool_calls[idx].function.arguments = ""
continue
# safety before concatenating text to .function.arguments
if final_tool_calls[idx].function.arguments is None:
final_tool_calls[idx].function.arguments = ""
Comment on lines +293 to +298
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Copilot AI Jun 4, 2025

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[nitpick] The check and assignment for function.arguments being None is repeated; consider refactoring this logic into a helper function to reduce duplication and improve maintainability.

Suggested change
if final_tool_calls[idx].function.arguments is None:
final_tool_calls[idx].function.arguments = ""
continue
# safety before concatenating text to .function.arguments
if final_tool_calls[idx].function.arguments is None:
final_tool_calls[idx].function.arguments = ""
self._ensure_arguments_initialized(final_tool_calls[idx].function)
continue
# safety before concatenating text to .function.arguments
self._ensure_arguments_initialized(final_tool_calls[idx].function)

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if tool_call.function.arguments:
final_tool_calls[idx].function.arguments += tool_call.function.arguments

# Optionally exit early if no tools in first chunks
if exit_if_first_chunk_no_tool and num_of_chunks <= 2 and len(final_tool_calls) == 0:
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