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ToolCallLimitMiddleware

toolCallLimitMiddleware limits how many tool calls an agent can make. It can count calls per run or across a thread and can continue, end, or raise an error when a limit is reached.

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Syntax

toolCallLimitMiddleware(options): AgentMiddleware

In-depth API docs are only for subscribers: parameters, examples, common mistakes and interview practice.

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  • ToolCallLimitExceededError
  • createAgent
  • AgentMiddleware
  • ToolMessage

Source: toolCallLimitMiddleware | langchain | LangChain Reference. Checked 2026-11-03.