Enum Content

Source

pub enum Content {
    Text {
        text: String,
        _meta: Option<Meta>,
    },
    Image {
        data: String,
        mime_type: String,
        _meta: Option<Meta>,
    },
    Audio {
        data: String,
        mime_type: String,
        _meta: Option<Meta>,
    },
    Resource {
        resource: EmbeddedResourceContents,
        _meta: Option<Meta>,
    },
    ToolUse {
        id: String,
        name: String,
        input: Value,
        _meta: Option<Meta>,
    },
    ToolResult {
        tool_use_id: String,
        content: Vec<ToolResultContent>,
        is_error: Option<bool>,
        _meta: Option<Meta>,
    },
}

Expand description

Content types for tool responses and sampling messages

Variants§

§

Text

Fields

§text: String

§_meta: Option<Meta>

§

Image

Fields

§data: String

§mime_type: String

§_meta: Option<Meta>

§

Audio

Audio content with base64-encoded data

Fields

§data: String

Base64-encoded audio data

§mime_type: String

MIME type (e.g., “audio/wav”, “audio/mp3”)

§_meta: Option<Meta>

§

Resource

Fields

§resource: EmbeddedResourceContents

The embedded resource contents

§_meta: Option<Meta>

§

ToolUse

Tool use request from LLM during sampling (MCP 2025-11-25)

Fields

§id: String

Unique identifier for this tool use

§name: String

Name of the tool to invoke

§input: Value

Tool input arguments

§_meta: Option<Meta>

§

ToolResult

Tool result to be passed back to LLM during sampling (MCP 2025-11-25)

Fields

§tool_use_id: String

ID of the tool use this is a result for

§content: Vec<ToolResultContent>

Content of the tool result

§is_error: Option<bool>

Whether the tool execution resulted in an error

§_meta: Option<Meta>

Implementations§

Source §

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

Create audio content with base64-encoded data

Source

pub fn resource( uri: impl Into<String>, mime_type: Option<String>, text: Option<String>, ) -> Self

Create embedded resource content

Source

pub fn from_resource_contents(contents: ResourceContents) -> Self

Create embedded resource content from ResourceContents

Source

pub fn tool_use( id: impl Into<String>, name: impl Into<String>, input: Value, ) -> Self

Create a tool use content (MCP 2025-11-25)

Used during sampling when the LLM wants to invoke a tool.

Source

pub fn tool_result( tool_use_id: impl Into<String>, content: Vec<ToolResultContent>, is_error: Option<bool>, ) -> Self

Create a tool result content (MCP 2025-11-25)

Used during sampling to return tool execution results to the LLM.

Source

pub fn tool_result_text( tool_use_id: impl Into<String>, text: impl Into<String>, ) -> Self

Create a successful tool result with text content (MCP 2025-11-25)

Source

pub fn tool_result_error( tool_use_id: impl Into<String>, error_message: impl Into<String>, ) -> Self

Create an error tool result (MCP 2025-11-25)

Source

pub fn ui_html(uri: impl Into<String>, html: impl Into<String>) -> Self

Create a UI HTML resource content (for MCP Apps Extension / MCP-UI)

This helper simplifies creating HTML UI resources by automatically formatting the resource JSON according to the MCP-UI specification.

§Example

use pulseengine_mcp_protocol::Content;

let html = r#"<html><body><h1>Hello!</h1></body></html>"#;
let content = Content::ui_html("ui://greetings/interactive", html);

This is equivalent to but much more concise than:

let resource_json = serde_json::json!({
    "uri": "ui://greetings/interactive",
    "mimeType": "text/html",
    "text": html
});
Content::Resource {
    resource: resource_json.to_string(),
    text: None,
    _meta: None,
}

Create a UI HTML resource content (for MCP Apps Extension / MCP-UI)

Source

pub fn ui_resource( uri: impl Into<String>, mime_type: impl Into<String>, content: impl Into<String>, ) -> Self

Create a UI resource content with custom MIME type (for MCP Apps Extension / MCP-UI)

This helper allows you to create UI resources with any MIME type and content.

§Example

use pulseengine_mcp_protocol::Content;

let json_data = r#"{"message": "Hello, World!"}"#;
let content = Content::ui_resource(
    "ui://data/greeting",
    "application/json",
    json_data
);

Source