ContentBlock

Enum ContentBlock 

Source
pub enum ContentBlock {
    Text(TextContent),
    Image(ImageContent),
    Audio(AudioContent),
    ResourceLink(ResourceLink),
    Resource(EmbeddedResource),
}
Expand description

Content blocks represent displayable information in the Agent Client Protocol.

They provide a structured way to handle various types of user-facing content—whether it’s text from language models, images for analysis, or embedded resources for context.

Content blocks appear in:

  • User prompts sent via session/prompt
  • Language model output streamed through session/update notifications
  • Progress updates and results from tool calls

This structure is compatible with the Model Context Protocol (MCP), enabling agents to seamlessly forward content from MCP tool outputs without transformation.

See protocol docs: Content

Variants§

§

Text(TextContent)

Plain text content

All agents MUST support text content blocks in prompts.

§

Image(ImageContent)

Images for visual context or analysis.

Requires the image prompt capability when included in prompts.

§

Audio(AudioContent)

Audio data for transcription or analysis.

Requires the audio prompt capability when included in prompts.

References to resources that the agent can access.

All agents MUST support resource links in prompts.

§

Resource(EmbeddedResource)

Complete resource contents embedded directly in the message.

Preferred for including context as it avoids extra round-trips.

Requires the embeddedContext prompt capability when included in prompts.

Trait Implementations§

Source§

impl Clone for ContentBlock

Source§

fn clone(&self) -> ContentBlock

Returns a duplicate of the value. Read more
1.0.0 · Source§

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

Performs copy-assignment from source. Read more
Source§

impl Debug for ContentBlock

Source§

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

Formats the value using the given formatter. Read more
Source§

impl<'de> Deserialize<'de> for ContentBlock

Source§

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

Deserialize this value from the given Serde deserializer. Read more
Source§

impl<T: Into<String>> From<T> for ContentBlock

Source§

fn from(value: T) -> Self

Converts to this type from the input type.
Source§

impl JsonSchema for ContentBlock

Source§

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

The name of the generated JSON Schema. Read more
Source§

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

Returns a string that uniquely identifies the schema produced by this type. Read more
Source§

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

Generates a JSON Schema for this type. Read more
Source§

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. Read more
Source§

impl PartialEq for ContentBlock

Source§

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 · Source§

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
Source§

impl Serialize for ContentBlock

Source§

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

Serialize this value into the given Serde serializer. Read more
Source§

impl StructuralPartialEq for ContentBlock

Auto Trait Implementations§

Blanket Implementations§

Source§

impl<T> Any for T
where T: 'static + ?Sized,

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

impl<T> Borrow<T> for T
where T: ?Sized,

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
Source§

impl<T> CloneToUninit for T
where T: Clone,

Source§

unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
Source§

impl<T> DynClone for T
where T: Clone,

Source§

fn __clone_box(&self, _: Private) -> *mut ()

Source§

impl<T> From<T> for T

Source§

fn from(t: T) -> T

Returns the argument unchanged.

Source§

impl<T, U> Into<U> for T
where U: From<T>,

Source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Source§

impl<T> ToOwned for T
where T: Clone,

Source§

type Owned = T

The resulting type after obtaining ownership.
Source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
Source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
Source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

Source§

type Error = Infallible

The type returned in the event of a conversion error.
Source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
Source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

Source§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
Source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
Source§

impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,