Struct AgentCapabilities 

pub struct AgentCapabilities {
    pub streaming: bool,
    pub push_notifications: bool,
    pub extensions: Vec<AgentExtension>,
    pub extended_agent_card: bool,
}

The capability set the agent advertises.

The three booleans are optional in the proto (their absence is equivalent to false), and the extensions list is the protocol-extension declaration. The struct itself is required — every card has a capabilities field, even if the value is the default “none of the optional things are on”.

Fields

streaming: bool

The agent supports SendStreamingMessage / SubscribeToTask. The client can subscribe to incremental updates.

push_notifications: bool

The agent accepts CreateTaskPushNotificationConfig and will POST to the registered webhook when a task changes. The actual delivery uses the SsrfDenylist the push-notification port consults.

extensions: Vec<AgentExtension>

The protocol extensions the agent supports. The list is always serialised (the spec marks the field as part of AgentCapabilities); an empty list means the agent speaks the base A2A v1.0 spec with no extensions.

extended_agent_card: bool

The agent publishes an extended card behind authentication. Per the spec, if this is false or absent, calls to GetExtendedAgentCard return ExtendedAgentCardNotConfiguredError (or UnsupportedOperationError, depending on the protocol binding).

Trait Implementations

impl Clone for AgentCapabilities

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AgentCapabilities

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

Formats the value using the given formatter.

impl Default for AgentCapabilities

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for AgentCapabilities

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for AgentCapabilities

impl PartialEq for AgentCapabilities

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for AgentCapabilities

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for AgentCapabilities