Struct McpCapabilities 

#[non_exhaustive]
pub struct McpCapabilities {
    pub stdio: Option<McpStdioCapabilities>,
    pub http: Option<McpHttpCapabilities>,
    pub acp: Option<McpAcpCapabilities>,
    pub meta: Option<Map<String, Value>>,
}

Available on crate feature unstable_protocol_v2 only.

MCP capabilities supported by the agent

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.

stdio: Option<McpStdioCapabilities>

Agent supports McpServer::Stdio.

Optional. Omitted or null both mean the agent does not advertise support. Supplying {} means the agent supports stdio MCP server transports.

http: Option<McpHttpCapabilities>

Agent supports McpServer::Http.

Optional. Omitted or null both mean the agent does not advertise support. Supplying {} means the agent supports HTTP MCP server transports.

acp: Option<McpAcpCapabilities>

Available on crate feature unstable_mcp_over_acp only.

UNSTABLE

This capability is not part of the spec yet, and may be removed or changed at any point.

Agent supports McpServer::Acp.

Optional. Omitted or null both mean the agent does not advertise support. Supplying {} means the agent supports ACP MCP server transports.

meta: Option<Map<String, Value>>

The _meta property is reserved by ACP to allow clients and agents to attach additional metadata to their interactions. Implementations MUST NOT make assumptions about values at these keys.

See protocol docs: Extensibility

Implementations

impl McpCapabilities

pub fn new() -> McpCapabilities

pub fn stdio( self, stdio: impl IntoOption<McpStdioCapabilities>, ) -> McpCapabilities

Agent supports McpServer::Stdio.

Omitted or null both mean the agent does not advertise support. Supplying {} means the agent supports stdio MCP server transports.

pub fn http(self, http: impl IntoOption<McpHttpCapabilities>) -> McpCapabilities

Agent supports McpServer::Http.

Omitted or null both mean the agent does not advertise support. Supplying {} means the agent supports HTTP MCP server transports.

pub fn acp(self, acp: impl IntoOption<McpAcpCapabilities>) -> McpCapabilities

Available on crate feature unstable_mcp_over_acp only.

UNSTABLE

This capability is not part of the spec yet, and may be removed or changed at any point.

Agent supports McpServer::Acp.

Omitted or null both mean the agent does not advertise support. Supplying {} means the agent supports ACP MCP server transports.

pub fn meta(self, meta: impl IntoOption<Map<String, Value>>) -> McpCapabilities

The _meta property is reserved by ACP to allow clients and agents to attach additional metadata to their interactions. Implementations MUST NOT make assumptions about values at these keys.

See protocol docs: Extensibility

Trait Implementations

impl Clone for McpCapabilities

fn clone(&self) -> McpCapabilities

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for McpCapabilities

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

Formats the value using the given formatter.

impl Default for McpCapabilities

fn default() -> McpCapabilities

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for McpCapabilities

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for McpCapabilities

impl IntoV1 for McpCapabilities

type Output = McpCapabilities

The corresponding v1 type.

fn into_v1( self, ) -> Result<<McpCapabilities as IntoV1>::Output, ProtocolConversionError>

Converts this value into the corresponding v1 type.

impl JsonSchema for McpCapabilities

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl PartialEq for McpCapabilities

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

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 McpCapabilities