Enum ContentBlock 

pub enum ContentBlock {
    Text {
        text: String,
    },
    Image {
        data: String,
        mime_type: String,
    },
    Audio {
        data: String,
        mime_type: String,
    },
    Resource(ResourceContent),
    ResourceLink {
        uri: String,
        name: Option<String>,
        mime_type: Option<String>,
    },
}

Content block from MCP tool call result.

Tagged by type field for JSON serialization. Each variant represents a different content type that an MCP server can return.

Uses #[serde(tag = "type")] rather than a newtype wrapper because the tag must appear as a field in the JSON map for deserialization.

Variants

Text

Plain text content

Fields

text: String

Image

Base64-encoded image with MIME type

Fields

data: String

mime_type: String

Audio

Base64-encoded audio with MIME type

Fields

data: String

mime_type: String

Resource(ResourceContent)

Embedded resource content (text or blob)

ResourceLink

Resource link (URI reference without inline data)

Fields

uri: String

name: Option<String>

mime_type: Option<String>

Implementations

impl ContentBlock

pub fn text(text: impl Into<String>) -> ContentBlock

Create a text content block.

pub fn image( data: impl Into<String>, mime_type: impl Into<String>, ) -> ContentBlock

Create an image content block.

pub fn audio( data: impl Into<String>, mime_type: impl Into<String>, ) -> ContentBlock

Create an audio content block.

pub fn resource(resource: ResourceContent) -> ContentBlock

Create a resource content block.

pub fn resource_link( uri: impl Into<String>, name: Option<String>, mime_type: Option<String>, ) -> ContentBlock

Create a resource link content block.

pub fn is_text(&self) -> bool

Check if this is a text block.

pub fn is_image(&self) -> bool

Check if this is an image block.

pub fn is_audio(&self) -> bool

Check if this is an audio block.

pub fn is_resource(&self) -> bool

Check if this is a resource block.

pub fn is_resource_link(&self) -> bool

Check if this is a resource link block.

Trait Implementations

impl Clone for ContentBlock

fn clone(&self) -> ContentBlock

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ContentBlock

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

Formats the value using the given formatter.

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

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ContentBlock

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

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 ContentBlock