Struct Icon 

pub struct Icon {
    pub src: String,
    pub mime_type: Option<String>,
    pub sizes: Option<Vec<String>>,
    pub theme: Option<IconTheme>,
}

Core MCP protocol types and error handling Icon for tools, resources, prompts, and implementations. Icons are display hints — most implementations do not need icons. See MCP spec

Fields

src: String

Icon source URL (data: URI or https:// URL)

mime_type: Option<String>

MIME type of the icon (e.g., “image/png”, “image/svg+xml”)

sizes: Option<Vec<String>>

Icon sizes (e.g., [“16x16”, “32x32”])

theme: Option<IconTheme>

Theme preference for this icon

Implementations

impl Icon

pub fn new(src: impl Into<String>) -> Icon

Create an icon from a URL

pub fn data_uri(mime_type: &str, base64_data: &str) -> Icon

Create an icon from a data: URI

pub fn with_mime_type(self, mime_type: impl Into<String>) -> Icon

pub fn with_sizes(self, sizes: Vec<String>) -> Icon

pub fn with_theme(self, theme: IconTheme) -> Icon

Trait Implementations

impl Clone for Icon

fn clone(&self) -> Icon

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Icon

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Icon

fn deserialize<__D>( __deserializer: __D, ) -> Result<Icon, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Icon

fn eq(&self, other: &Icon) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Icon

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Icon