Unverified50% confidenceFactExact time
The Tool Calls events within Messages capture the tool-call intent in the AIMessage, whereas the standalone Tool Calls events capture the ToolMessage results after the tool has actually executed.
1
Sources
50%
Confidence
Long-term
Relevance
10/25/2026
First Seen
Sources
LangChain Agent Event Streaming Explained: A Practical Guide
bilibili老鱼干Pro10/24/2026
Related Entities
Related Claims
VerifiedAfter the client receives the tool execution result, it needs to construct a message with the role set to tool, carrying the corresponding tool_call_id and execution result to send back to the model.77% similarUnverified在Agent Scratchpad中，LLM生成的工具调用作为AI Message存储，工具返回的结果作为Tool Message存储，两者通过tool_call_id进行关联77% similarUnverifiedTool calling refers to the mechanism by which an Agent requests the execution of an external function through a structured message and has the result returned; the returned content enters the conversation history as a message with role: 'tool' and from then on permanently occupies the context.73% similarUnverifiedTool Calling is a key capability for whether a local model can handle email summarization; a model that supports tool calling can proactively call external functions (such as reading mailbox emails) according to instructions, while one that does not can only answer out of thin air or rely on already injected context, potentially producing summaries that do not match the real emails.72% similarUnverifiedLazy loading means not exposing all tool definitions in the first-round request, but first letting the model retrieve or declare the required capabilities through a meta-tool, after which the runtime dynamically injects the relevant tool schemas.71% similar
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