add support for mcp server instructions

Author: huixin

src/core/prompts/sections/mcp-servers.ts

@@ -39,6 +39,7 @@ export async function getMcpServersSection(
 
 						return (
 							`## ${server.name} (\`${config.command}${config.args && Array.isArray(config.args) ? ` ${config.args.join(" ")}` : ""}\`)` +
+							(server.instructions ? `\n\n${server.instructions}` : "") +
 							(tools ? `\n\n### Available Tools\n${tools}` : "") +
 							(templates ? `\n\n### Resource Templates\n${templates}` : "") +
 							(resources ? `\n\n### Direct Resources\n${resources}` : "")

src/services/mcp/McpHub.ts

@@ -563,6 +563,7 @@ export class McpHub {
 			await client.connect(transport)
 			connection.server.status = "connected"
 			connection.server.error = ""
+			connection.server.instructions = client.getInstructions()
 
 			// Initial fetch of tools and resources
 			connection.server.tools = await this.fetchToolsList(name, source)

src/shared/mcp.ts

@@ -17,6 +17,7 @@ export type McpServer = {
 	timeout?: number
 	source?: "global" | "project"
 	projectPath?: string
+	instructions?: string
 }
 
 export type McpTool = {

webview-ui/src/components/mcp/McpView.tsx

@@ -348,6 +348,16 @@ const ServerRow = ({ server, alwaysAllowMcp }: { server: McpServer; alwaysAllowM
 							fontSize: "13px",
 							borderRadius: "0 0 4px 4px",
 						}}>
+						{server.instructions && (
+							<div
+								style={{
+									paddingTop: "5px 0",
+									opacity: 0.8,
+									fontSize: "12px",
+								}}>
+								{server.instructions}
+							</div>
+						)}
 						<VSCodePanels style={{ marginBottom: "10px" }}>
 							<VSCodePanelTab id="tools">
 								{t("mcp:tabs.tools")} ({server.tools?.length || 0})