McpClient.callTool

tools/call. Per-request progressToken / logLevel / onProgress are carried in opts (see RequestOptions).

Against a draft (MRTR / SEP-2322) server this transparently completes a Multi Round-Trip Request: if the server answers with an InputRequiredResult (the result carries inputRequests), each request is dispatched to the matching onSampling / onElicitation / onListRoots handler and the original tools/call is resubmitted with the answers in the top-level params.inputResponses map (and the server's opaque requestState echoed back), looping until the server returns a completed CallToolResult. The loop only engages when draft mode is enabled (see enableModern/connect); other protocol versions never see inputRequests.

CallToolResult callTool(string name, Json arguments, RequestOptions opts)
class McpClient
@safe
CallToolResult
callTool
(
string name
,
Json arguments = Json.emptyObject
,
RequestOptions opts = RequestOptions.init
)
CallToolResult callTool(string name, T args, RequestOptions opts)
CallToolResult callTool(string name, Json arguments, void delegate(ProgressNotification) @(safe) onProgress)
CallToolResult callTool(string name, T args, void delegate(ProgressNotification) @(safe) onProgress)
CallToolResult callTool(Tool tool, Json arguments, RequestOptions opts)