Issue with tool calls

[mattmas]

Just tried the package today, but ran into a problem when calling an MCP tool:

{"type":"error","error":{"type":"invalid_request_error","message":"messages.8.content.0: unexpected tool_use_id found in tool_result blocks: toolu_01NGSZ6A8jPBzZr8prgLzR7P. Each tool_result block must have a corresponding tool_use block in the previous message."},"request_id":"req_011CYByzUedawPRMujMEod1a"}

This comes back from Anthropic, but it seems like an issue with how the messages are built?

Claude says:

The API requires this strict pattern:

1. Assistant message contains a tool_use block with an id
2. Next user message contains a tool_result block whose tool_use_id matches that id