Struct McpClientCapabilities 

#[non_exhaustive]
pub struct McpClientCapabilities {
    pub experimental: Option<BTreeMap<String, Map<String, Value>>>,
    pub extensions: Option<BTreeMap<String, Map<String, Value>>>,
    pub roots: Option<RootsCapabilities>,
    pub sampling: Option<SamplingCapability>,
    pub elicitation: Option<ElicitationCapability>,
    pub tasks: Option<TasksCapability>,
}

Re-exports of the rmcp wire-protocol types this crate now surfaces directly instead of wrapping. Pull these in to pattern-match on tool annotations, content blocks, structured tool output, embedded resources, sampling / elicitation requests, progress and log notifications, etc.

Builder

let cap = ClientCapabilities::builder()
    .enable_experimental()
    .enable_roots()
    .enable_roots_list_changed()
    .build();

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.

experimental: Option<BTreeMap<String, Map<String, Value>>>

extensions: Option<BTreeMap<String, Map<String, Value>>>

Optional MCP extensions that the client supports (SEP-1724). Keys are extension identifiers (e.g., "io.modelcontextprotocol/ui"), values are per-extension settings objects. An empty object indicates support with no settings.

roots: Option<RootsCapabilities>

sampling: Option<SamplingCapability>

Capability for LLM sampling requests (SEP-1577)

elicitation: Option<ElicitationCapability>

Capability to handle elicitation requests from servers for interactive user input

tasks: Option<TasksCapability>

Trait Implementations

impl Clone for ClientCapabilities

fn clone(&self) -> ClientCapabilities

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ClientCapabilities

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

Formats the value using the given formatter.

impl Default for ClientCapabilities

fn default() -> ClientCapabilities

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ClientCapabilities

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ClientCapabilities

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

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 ClientCapabilities