ActionAnthropicUpdated May 2026

How do I use Claude with tool/function calling?

Short answer: Drop the "Anthropic → Create Message with Tools" action anywhere in your workflow, map the inputs from upstream nodes, and publish.

Use this action All 21 Anthropic actions

Inputs

The fields this action accepts.

Every field can be mapped from an upstream trigger, AI step, table row, or hard-coded literal.

Field	Type	Required	Description
Model model	options	Required	Model. Options: Claude Opus 4.7, Claude Sonnet 4.6, Claude Haiku 4.5
User Message message	string	Required	User Message (required)
System Prompt system	string	Optional	System Prompt
Tools tools	array	Required	Array of tool defs: { name, description, input_schema: { type, properties, required } }
Tool Choice tool_choice_type	options	Optional	Tool Choice. Options: Auto, Any, Tool (force)
Max Tokens max_tokens	string	Optional	Max Tokens

Sample request

{
  "model": "{{trigger.model}}",
  "message": "{{trigger.message}}",
  "system": "{{trigger.system}}",
  "tools": "{{trigger.tools}}",
  "tool_choice_type": "{{trigger.tool_choice_type}}"
}

Returns

{
  "id": "msg_abc",
  "role": "assistant",
  "model": "claude-opus-4-7",
  "usage": {
    "input_tokens": 30,
    "output_tokens": 25
  },
  "content": [
    {
      "id": "tool_abc",
      "name": "get_weather",
      "type": "tool_use",
      "input": {
        "city": "Mumbai"
      }
    }
  ],
  "stop_reason": "tool_use"
}

Use these fields in downstream nodes for routing, logging, or error handling.

Triggered by

Apps that pair well as the trigger for Create Message with Tools.

Any of these apps can fire this action as part of a workflow.

Google Sheets → Anthropic

2 Google Sheets triggers

HubSpot → Anthropic

18 HubSpot triggers

FAQ

Questions about Create Message with Tools.

What does the Create Message with Tools action do in Anthropic?

Sends a message with tool definitions. Claude returns tool_use blocks when it wants to call a function; you execute the call and feed results back as tool_result blocks for the next turn. The foundation for agentic workflows.

What inputs does Create Message with Tools require?

Required: Model, User Message, Tools. Every input accepts a static value or a variable from any upstream node in your workflow.

Can I use dynamic inputs from earlier workflow nodes?

Yes. Any field on this action can pull values from upstream nodes, whether that's a form response, a trigger payload, an AI output, or a lookup result.

What happens if Anthropic returns an error?

The workflow pauses on the failed node, the error message is captured in the run log, and you can retry the run with one click. Auto-retry policies are configurable per workflow with exponential backoff up to 5 attempts.

Does Create Message with Tools support batch operations?

Yes. Run Create Message with Tools inside a Loop node to process arrays. Tiny Command handles Anthropic's rate limits automatically so you don't have to throttle manually.

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