Nous.ToolSchema (nous v0.15.5)

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Convert tools to different schema formats for various providers.

Different LLM providers expect different tool schema formats:

  • OpenAI format: String keys, function wrapper
  • Anthropic format: Atom keys, input_schema field
  • Custom providers: May require format-specific adaptations

Examples

# Convert to OpenAI format (used by OpenAI, Groq, OpenRouter, local providers)
openai_schema = ToolSchema.to_openai(tool)
# Returns: %{"type" => "function", "function" => %{"name" => "...", ...}}

# Convert to Anthropic format (used by Claude)
anthropic_schema = ToolSchema.to_anthropic(tool)
# Returns: %{name: "...", description: "...", input_schema: %{type: :object, ...}}

The schema conversion preserves all tool metadata while adapting to provider requirements.

Summary

Functions

to_anthropic(tool)

Convert tool to Anthropic tool schema (atom keys).

to_openai(tool)

Convert tool to OpenAI function calling schema (string keys).

Functions

to_anthropic(tool)

@spec to_anthropic(Nous.Tool.t()) :: map()

Convert tool to Anthropic tool schema (atom keys).

Anthropic uses a different format with atom keys: %{ name: "tool_name", description: "Tool description", input_schema: %{

type: "object",
properties: %{...},
required: [...]

} }

to_openai(tool)

@spec to_openai(Nous.Tool.t()) :: map()

Convert tool to OpenAI function calling schema (string keys).