Struct McpContext 

pub struct McpContext {
    pub client_name: Option<String>,
    pub client_version: Option<String>,
    pub session_id: Option<String>,
    pub auth_claims: Option<String>,
}

Per-request context passed to tool handlers registered via McpServer::tool_with_context — caller identity and session info that a plain Fn(&str) -> ... tool handler has no way to see.

Constructed in McpServer::execute from the current request’s headers plus whatever clientInfo was recorded for this session at initialize time (see McpServer::handle_request_with_context).

Fields

client_name: Option<String>

clientInfo.name sent in this session’s initialize call, if the client sent one and this request carries a recognized Mcp-Session-Id.

client_version: Option<String>

clientInfo.version sent in this session’s initialize call, under the same conditions as client_name.

session_id: Option<String>

The Mcp-Session-Id header on this request, if present — the value the server minted and returned in the initialize response header for this session (see the module docs’ Sessions section).

auth_claims: Option<String>

Verified JWT claims as a JSON string. Not populated by anything in this crate yet — reserved for a future JWT-auth integration (MCP_TODO.md TODO-11/TODO-13); always None today.

Trait Implementations

impl Clone for McpContext

fn clone(&self) -> McpContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for McpContext

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

Formats the value using the given formatter.

impl Default for McpContext

fn default() -> McpContext

Returns the “default value” for a type.