Struct SamplingMessage 

pub struct SamplingMessage {
    pub role: Role,
    pub content: SamplingContentBlock,
    pub meta: Option<HashMap<String, Value>>,
}

Message in a sampling request.

Per MCP 2025-11-25, content can be a single SamplingMessageContentBlock or an array of them.

Fields

role: Role

Message role.

content: SamplingContentBlock

Message content (single block or array per spec).

meta: Option<HashMap<String, Value>>

Extension metadata.

Implementations

impl SamplingMessage

pub fn user(text: impl Into<String>) -> SamplingMessage

Create a user message with text content.

pub fn assistant(text: impl Into<String>) -> SamplingMessage

Create an assistant message with text content.

Trait Implementations

impl Clone for SamplingMessage

fn clone(&self) -> SamplingMessage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SamplingMessage

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

Formats the value using the given formatter.

impl Default for SamplingMessage

fn default() -> SamplingMessage

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for SamplingMessage

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for SamplingMessage

fn eq(&self, other: &SamplingMessage) -> 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 SamplingMessage

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 SamplingMessage