Struct Tool 

pub struct Tool {
    pub name: &'static str,
    pub feature: Feature,
    pub description: Option<String>,
    pub input: Arc<JsonObject>,
    pub output: Option<Arc<JsonObject>>,
    pub long: bool,
    pub ui: Option<&'static str>,
    pub app_only: bool,
    pub hints: Option<Hints>,
    pub looks: Looks,
}

An operation as callers see it.

Fields

name: &'static str

feature: Feature

description: Option<String>

The arguments type’s doc comment.

input: Arc<JsonObject>

output: Option<Arc<JsonObject>>

Absent when the result is not a JSON object, which MCP’s structured output cannot describe.

long: bool

Runs as a task for callers that support tasks.

ui: Option<&'static str>

The MCP App that shows this tool’s results: a ui:// resource.

app_only: bool

Called by an MCP App only, such as an undo button, and kept from the model.

hints: Option<Hints>

What a host may assume about the tool, when the module says.

looks: Looks

Trait Implementations

impl Clone for Tool

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Tool

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.