Struct FnTool 

pub struct FnTool { /* private fields */ }

A tool built from a closure — the quickest way to hand the model a function.

use agentyk_core::{FnTool, ToolOutput};
use serde_json::json;

let add = FnTool::new(
    "add",
    "Add two numbers.",
    json!({
        "type": "object",
        "properties": {"a": {"type": "number"}, "b": {"type": "number"}},
        "required": ["a", "b"]
    }),
    |args| async move {
        let a = args["a"].as_f64().unwrap_or(0.0);
        let b = args["b"].as_f64().unwrap_or(0.0);
        ToolOutput::text((a + b).to_string())
    },
);

Implementations

impl FnTool

pub fn new<F, Fut>( name: impl Into<String>, description: impl Into<String>, parameters: Value, handler: F, ) -> FnTool

where F: Fn(Value) -> Fut + Send + Sync + 'static, Fut: Future<Output = ToolOutput> + Send + 'static,

Wrap a closure as a tool. parameters is the JSON schema the model sees for the arguments.

Trait Implementations

impl Tool for FnTool

fn definition(&self) -> ToolDefinition

What the model is told about this tool.

fn execute<'life0, 'life1, 'async_trait>( &'life0 self, arguments: Value, _context: &'life1 ToolContext, ) -> Pin<Box<dyn Future<Output = ToolOutput> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, FnTool: 'async_trait,

Run it.

fn policy(&self) -> ToolPolicy

Default: always offered to the model — see ToolPolicy.