[BUG] Tool not getting invoked in agent flow when using Amazon Nova, but it works with Claude

[inno-elon]

Describe the bug
Tool not getting invoked in agent flow when using Amazon Nova, but it works with Claude

To Reproduce
In a sequential agent flow, use Nova in a Bedrock node, attach a tool, and ask it to search the web for something. Try it with claude and you'll see that it works.

Expected behavior
Tool should be invoked (ie: Exa search)

Flow

Additional context

The tool gets passed, but it will never invoke the tool. In a chat flow with ConversationalAgent, Nova works. I believe that's because of the way it manages memory and also because some langchainjs code is copy/pasted into that file (constructScratchPad). In langchain, it appears that only claude models will invoke tools when using the bind_tools method.