Attribute Macro tool 

#[tool]

The #[tool] attribute macro for defining tools.

This macro transforms a regular Rust function into a tool that can be used with the mistral.rs agentic loop. It generates:

• {fn_name}_tool() - Returns the Tool definition
• {fn_name}_callback() - Returns an Arc<ToolCallback> that wraps the function
• {fn_name}_tool_with_callback() - Returns both as a tuple

Attributes

• description (required): A description of what the tool does
• name (optional): Override the tool name (defaults to function name)

Parameter Attributes

• #[description = "..."]: Description of the parameter
• #[default = value]: Default value if parameter is optional

Requirements

• All parameter types must implement serde::Deserialize and schemars::JsonSchema
• The return type must be Result<T> or anyhow::Result<T> where T: Serialize
• For async functions, ensure a tokio runtime is available