Function listAllTools

packages/plugins/mcp/src/sdk/discover.ts:41–80

(
  connection: McpConnection,
)

 * returns one page, not the catalog).
 */
const listAllTools = (
  connection: McpConnection,
): Effect.Effect<McpToolManifest, McpToolDiscoveryError> =>
  Effect.gen(function* () {
    const tools: unknown[] = [];
    let cursor: string | undefined = undefined;

    for (let page = 0; page < MAX_LIST_TOOLS_PAGES; page++) {
      const params: { cursor?: string } | undefined = cursor === undefined ? undefined : { cursor };
      const listResult = yield* Effect.tryPromise({
        try: () => connection.client.listTools(params),
        catch: () =>
          new McpToolDiscoveryError({
            stage: "list_tools",
            message: "Failed listing MCP tools",
          }),
      });

      const decoded = decodeListToolsPage(listResult);
      if (Option.isNone(decoded)) {
        return yield* new McpToolDiscoveryError({
          stage: "list_tools",
          message: "MCP listTools response did not match the expected schema",
        });
      }

      tools.push(...decoded.value.tools);
      const nextCursor = decoded.value.nextCursor;
      if (nextCursor == null || nextCursor === "") break;
      cursor = nextCursor;
    }

    return extractManifestFromListToolsResult(
      { tools },
      {
        serverInfo: connection.client.getServerVersion?.(),
        instructions: connection.client.getInstructions?.(),
      },
    );
  });

/**
 * Connect to an MCP server and discover all available tools.