fix: refresh mcp server functionality

Author: chungjac

server/aws-lsp-codewhisperer/src/language-server/agenticChat/agenticChatController.ts

@@ -415,9 +415,27 @@ export class AgenticChatController implements ChatHandlers {
         }
     }
     async onMcpServerClick(params: McpServerClickParams) {
-        return {
-            id: params.id,
-            success: true,
+        switch (params.id) {
+            case 'refresh-mcp-list':
+                try {
+                    await McpManager.instance.reinitializeMcpServers()
+                    return {
+                        id: params.id,
+                        success: true,
+                    }
+                } catch (err) {
+                    this.#features.logging.error(`Failed to reinitialize MCP servers: ${err}`)
+                    return {
+                        id: params.id,
+                        success: false,
+                        error: err instanceof Error ? err.message : 'Unknown error when reinitializing MCP server',
+                    }
+                }
+            default:
+                return {
+                    id: params.id,
+                    success: true,
+                }
         }
     }
 

server/aws-lsp-codewhisperer/src/language-server/agenticChat/tools/mcp/mcpManager.ts

@@ -412,6 +412,28 @@ export class McpManager {
         McpManager.#instance = undefined
     }
 
+    /**
+     * Reinitialize all MCP servers by closing existing connections and rediscovering servers
+     */
+    public async reinitializeMcpServers(): Promise<void> {
+        this.features.logging.info('Reinitializing MCP servers')
+
+        try {
+            // Close all existing connections
+            await this.close()
+
+            // Reinitialize with the same configuration paths
+            const newMcpManager = await McpManager.init(this.configPaths, this.features)
+
+            this.features.logging.info(
+                `MCP servers reinitialized completed with mcpServers count: ${newMcpManager.mcpServers.size}`
+            )
+        } catch (err: any) {
+            this.features.logging.error(`Error reinitializing MCP servers: ${err.message}`)
+            throw err
+        }
+    }
+
     /**
      * Check if a tool requires approval.
      */