build tool
This block is part of the anthropic group and was last modified in core v15.0.0.
Function Selection Required
This block requires you to choose a custom function to execute when triggered. You must manually select the function you want to use using the function selector modal. To access the modal, click the white button on the block.
build tool v15.0.0 Define a tool Claude can call and pick the function that runs it. The function receives the model's arguments as in-pins and returns the result back to Claude. Feed the output into a message block's tools pin.
- name required
valueTool name (snake_case), e.g. get_weather. Claude uses it to decide when to call the tool.
- description
valueWhat the tool does and when to use it. The clearer this is, the better Claude calls it.
- parameters
anthropicschemaThe shape of the tool's arguments. Build it with the 'build output template' block. Omit for a no-argument tool.
- tool
anthropictoolThe tool definition; wire into a message block's tools pin.
tool |
skill |
function call |
claude tool |
agent tool |
define tool |
A typical wiring for build tool: value feeds the name pin; the tool out pin feeds send message.
Version history
Introduced in v15.0.0.
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