Struct SamplingMessage 

#[non_exhaustive]
pub struct SamplingMessage {
    pub role: String,
    pub content: SamplingContent,
}

One message in a SamplingRequest::messages history. The MCP spec defines role as the free-form string "user" or "assistant"; richer typing is intentionally deferred to the transport boundary.

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.

role: String

Speaker role. Wire values: "user" or "assistant".

content: SamplingContent

Message payload. Only SamplingContent::Text is supported in this cluster; see the module-level note on unsupported content variants.

Implementations

impl SamplingMessage

pub fn new(role: impl Into<String>, content: SamplingContent) -> Self

Constructs a new SamplingMessage with the given role and content.

Required for external callers after #[non_exhaustive] prevents struct-literal construction outside the crate.

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

Formats the value using the given formatter.

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

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for SamplingMessage

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

where __S: Serializer,

Serialize this value into the given Serde serializer.