Struct RequestContext 

pub struct RequestContext {

    pub start: Instant,
    pub http_method: Method,
    pub path: String,
    pub request_size: usize,
    pub wants_sse: bool,
    pub session_id: Option<String>,
    pub jsonrpc: Option<ParsedBody>,
    pub mcp_method: Option<McpMethod>,
    pub mcp_method_str: Option<String>,
    pub tool: Option<String>,
    pub is_batch: bool,
    pub client_info_from_init: Option<ClientInfo>,
    pub client_name: Option<String>,
    pub client_version: Option<String>,
    pub tags: Vec<&'static str>,
}

Fields

start: Instant

http_method: Method

path: String

request_size: usize

wants_sse: bool

session_id: Option<String>

jsonrpc: Option<ParsedBody>

mcp_method: Option<McpMethod>

mcp_method_str: Option<String>

String form for event output. Set to the protocol method for MCP POSTs and overwritten by specific handlers where appropriate (e.g. “SSE”).

tool: Option<String>

tools/call tool name; None for other methods.

is_batch: bool

client_info_from_init: Option<ClientInfo>

Parsed from initialize params. The Initialize success path stores this into the session store.

client_name: Option<String>

Resolved from the session store by the handler before emit.

client_version: Option<String>

tags: Vec<&'static str>

Transform tags pushed by handlers / middleware. The emit stage joins them with + to build the RequestEvent.note field (e.g. ["rewritten", "sse"] → "rewritten+sse").