product · inferred from evidence
FastMCP
A framework or library used to build MCP servers, mentioned as commonly not setting `additionalProperties: false`.
- n8n 1.119.1 breaks MCP tool calls with "toolCallId: Unexpected keyword argument" validation error
I updated n8n to 1.119.1 and now my MCP tool calls fail. The agent returns: "Error calling tool 'my_tool': 1 validation error for call[my_tool] toolCallId Unexpected keyword argument". My previous workflows ran fine before the update. In an