Struct ResultMetaObject 

pub struct ResultMetaObject {
    pub io_modelcontextprotocol_server_info: Option<Implementation>,
    pub extra: Option<Map<String, Value>>,
}

Latest MCP Protocol 2026_07_28 Extends {@link MetaObject} with additional result-specific fields. All key naming rules from MetaObject apply.

JSON schema

{
 "description": "Extends {@link MetaObject} with additional result-specific fields. All key naming rules from MetaObject apply.",
 "type": "object",
 "properties": {
   "io.modelcontextprotocol/serverInfo": {
     "description": "Identifies the server software producing the response. Servers SHOULD\ninclude this field on every response unless specifically configured not\nto do so.\n\nThe {@link Implementation} schema requires name and version; other\nfields are optional.\n\nThe value is self-reported by the server and is not verified by the\nprotocol. It is intended for display, logging, and debugging. Clients\nSHOULD NOT use it to change their behavior, and SHOULD NOT rely on it for\nsecurity decisions.",
     "$ref": "#/$defs/Implementation"
   }
 },
 "additionalProperties": {}
}

Fields

io_modelcontextprotocol_server_info: Option<Implementation>

Identifies the server software producing the response. Servers SHOULD include this field on every response unless specifically configured not to do so. The {@link Implementation} schema requires name and version; other fields are optional. The value is self-reported by the server and is not verified by the protocol. It is intended for display, logging, and debugging. Clients SHOULD NOT use it to change their behavior, and SHOULD NOT rely on it for security decisions.

extra: Option<Map<String, Value>>

Trait Implementations

impl Clone for ResultMetaObject

fn clone(&self) -> ResultMetaObject

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ResultMetaObject

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

Formats the value using the given formatter.

impl Default for ResultMetaObject

fn default() -> ResultMetaObject

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ResultMetaObject

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ResultMetaObject

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

where __S: Serializer,

Serialize this value into the given Serde serializer.