/**
* Supported transport protocol types.
*
* - `stdio`: Uses stdin/stdout for communication (default for CLI usage).
* - `http`: Uses HTTP/SSE for communication (for web-based clients).
*/
export type TransportType = "stdio" | "http";
/**
* Request payload size limits in bytes for different transport protocols.
*
* These limits represent the maximum size of the JSON-RPC request body that can be
* sent to the MCP server.
*
* - `stdio`: Uses stdin/stdout with no inherent protocol limit. The limit is effectively
* determined by system memory and buffer sizes. We advertise a conservative 50 MiB limit
* but this is **informational only** - not enforced at the transport level.
*
* - `http`: Uses Express.js with the body-parser limit configured to 100 KB for JSON payloads.
* Note: Express's `bytes` library uses binary (1 KB = 1024 bytes).
* This value is **explicitly enforced** via `express.json({ limit })` in the HTTP transport.
* Requests exceeding this limit will be rejected with HTTP 413 Payload Too Large.
*
* @remarks
* These values are exposed in each tool's `_meta` field as `com.mongodb/maxRequestPayloadBytes`
* to inform LLMs about the size constraints when constructing tool call arguments.
*/
export const TRANSPORT_PAYLOAD_LIMITS: Record<TransportType, number> = {
/** Advertised limit for stdio transport (50 MiB - informational, not enforced) */
stdio: 50 * 1024 * 1024,
/** Enforced limit for HTTP transport configured in Express middleware) */
http: 100 * 1024,
} as const;
