Struct IconInfo 

#[non_exhaustive]
pub struct IconInfo {
    pub src: String,
    pub mime_type: Option<String>,
    pub sizes: Option<Vec<String>>,
    pub theme: Option<IconTheme>,
}

Icon information for entities (MCP 2025-11-25).

Backward Compatibility

This struct is #[non_exhaustive]. Use the constructor to remain forward-compatible:

use pmcp::types::protocol::IconInfo;

let icon = IconInfo::new("https://example.com/icon.png")
    .with_mime_type("image/png")
    .with_sizes(vec!["32x32".to_string()]);

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

src: String

Icon source URL.

Serialized as src per the MCP 2025-11-25 spec. Accepts url as a deserialize alias for backwards compat with pre-2025-11-25 servers.

mime_type: Option<String>

Icon MIME type

sizes: Option<Vec<String>>

Icon sizes (e.g., ["16x16", "32x32"])

theme: Option<IconTheme>

Icon theme preference

Implementations

impl IconInfo

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

Create an IconInfo with the icon source URL.

Optional fields (mime_type, sizes, theme) default to None. The argument is serialized as src per MCP 2025-11-25 spec.

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

Set the MIME type for the icon.

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

Set the icon sizes (e.g., [“16x16”, “32x32”]).

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

Set the icon theme preference.

Trait Implementations

impl Clone for IconInfo

fn clone(&self) -> IconInfo

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IconInfo

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

Formats the value using the given formatter.

impl Default for IconInfo

fn default() -> IconInfo

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for IconInfo

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for IconInfo

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

where __S: Serializer,

Serialize this value into the given Serde serializer.