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Claude Agent SDK for Elixir – Build AI agents with Claude Code
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lib/claude_code/content/tool_use_block.ex
defmodule ClaudeCode.Content.ToolUseBlock do
@moduledoc """
Represents a tool use content block within a Claude message.
Tool use blocks indicate that Claude wants to invoke a specific tool
with the given parameters.
"""
@enforce_keys [:type, :id, :name, :input]
defstruct [:type, :id, :name, :input]
@type t :: %__MODULE__{
type: :tool_use,
id: String.t(),
name: String.t(),
input: map()
}
@doc """
Creates a new ToolUse content block from JSON data.
## Examples
iex> ToolUse.new(%{"type" => "tool_use", "id" => "123", "name" => "Read", "input" => %{}})
{:ok, %ToolUse{type: :tool_use, id: "123", name: "Read", input: %{}}}
iex> ToolUse.new(%{"type" => "text"})
{:error, :invalid_content_type}
"""
@spec new(map()) :: {:ok, t()} | {:error, atom() | {:missing_fields, [atom()]}}
def new(%{"type" => "tool_use"} = data) do
required = ["id", "name", "input"]
missing = Enum.filter(required, &(not Map.has_key?(data, &1)))
if Enum.empty?(missing) do
content = %__MODULE__{
type: :tool_use,
id: data["id"],
name: data["name"],
input: data["input"]
}
{:ok, content}
else
{:error, {:missing_fields, Enum.map(missing, &String.to_atom/1)}}
end
end
def new(_), do: {:error, :invalid_content_type}
@doc """
Type guard to check if a value is a ToolUse content block.
"""
@spec tool_use_content?(any()) :: boolean()
def tool_use_content?(%__MODULE__{type: :tool_use}), do: true
def tool_use_content?(_), do: false
end