import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { z } from "zod";
import { socketClient } from "./client.js";
export function registerTextInputTool(server: McpServer) {
server.tool(
"simulate_text_input",
"Simulates keyboard input, typing the specified text content character by character into the currently focused input field or application element. Allows configuration of typing speed via inter-keystroke delay and initial delay. This action modifies the content of the target input field.",
{
text: z.string().describe("Required. The string of text content to be typed out by the simulated keyboard input."),
delay_ms: z.number().int().nonnegative().optional().describe("The delay in milliseconds between each simulated keystroke. Adjusts the typing speed."),
initial_delay_ms: z.number().int().nonnegative().optional().describe("An initial delay in milliseconds before the simulation of typing begins. Useful for ensuring the target field is ready."),
},
{
title: "Simulate Keyboard Text Input into Focused Field",
readOnlyHint: false,
destructiveHint: true,
idempotentHint: false,
openWorldHint: false,
},
async ({ text, delay_ms, initial_delay_ms }) => {
try {
// Validate required parameters
if (!text) {
return {
isError: true,
content: [
{
type: "text",
text: "The text parameter is required and cannot be empty",
},
],
};
}
console.error(`Simulating text input with params: ${JSON.stringify({
text: text.length > 50 ? `${text.substring(0, 50)}...` : text,
delay_ms,
initial_delay_ms
})}`);
await socketClient.sendCommand('simulate_text_input', {
text,
delay_ms,
initial_delay_ms
});
return {
content: [
{
type: "text",
text: `Successfully simulated typing of ${text.length} characters`,
},
],
};
} catch (error) {
console.error('Text input simulation error:', error);
return {
isError: true,
content: [
{
type: "text",
text: `Failed to simulate text input: ${(error as Error).message}`,
},
],
};
}
},
);
}
