Function parse_tool_args 

pub fn parse_tool_args<T>(call: &ToolCall) -> Result<T, ToolArgsError>
where
    T: DeserializeOwned,

Parses and deserializes tool call arguments into the specified type.

Uses serde for deserialization, so the target type must implement DeserializeOwned. Returns a descriptive error if JSON parsing or deserialization fails.

Example

use serde::Deserialize;
use modelrelay::parse_tool_args;

#[derive(Deserialize)]
struct WeatherArgs {
    location: String,
    #[serde(default = "default_unit")]
    unit: String,
}

fn default_unit() -> String { "celsius".to_string() }

// In your tool handler:
let args: WeatherArgs = parse_tool_args(&tool_call)?;
println!("Location: {}", args.location);