Struct Tool 

pub struct Tool {
    pub name: String,
    pub description: String,
    pub params: Vec<ToolParam>,
    pub handler: ToolHandler,
}

A tool definition

This represents a single tool with its metadata and handler function.

Fields

name: String

description: String

params: Vec<ToolParam>

handler: ToolHandler

Implementations

impl Tool

pub fn builder(name: &str, description: &str) -> ToolBuilder

Create a new tool definition with a builder

Example

Tool::new("get_price", "Get the price of a product")
    .param_i64("product_id", "The product ID", true)
    .handler(handle_get_price)

pub fn to_json_schema(&self) -> Value

Convert tool definition to JSON Schema format

Returns a JSON object compatible with MCP protocol:

{
  "name": "tool_name",
  "description": "Tool description",
  "inputSchema": {
    "type": "object",
    "properties": { ... },
    "required": [ ... ]
  }
}