diff --git a/packages/core/src/telemetry/clearcut-logger/clearcut-logger.ts b/packages/core/src/telemetry/clearcut-logger/clearcut-logger.ts
index 32dcf926..dd506bf0 100644
--- a/packages/core/src/telemetry/clearcut-logger/clearcut-logger.ts
+++ b/packages/core/src/telemetry/clearcut-logger/clearcut-logger.ts
@@ -385,12 +385,14 @@ export class ClearcutLogger {
       {
         gemini_cli_key:
           EventMetadataKey.GEMINI_CLI_START_SESSION_MCP_SERVERS_COUNT,
-        value: event.mcp_servers_count ? event.mcp_servers_count : '',
+        value: event.mcp_servers_count
+          ? event.mcp_servers_count.toString()
+          : '',
       },
       {
         gemini_cli_key:
           EventMetadataKey.GEMINI_CLI_START_SESSION_MCP_TOOLS_COUNT,
-        value: event.mcp_tools_count ? event.mcp_tools_count : '',
+        value: event.mcp_tools_count?.toString() ?? '',
       },
       {
         gemini_cli_key: EventMetadataKey.GEMINI_CLI_START_SESSION_MCP_TOOLS,
diff --git a/packages/core/src/telemetry/loggers.test.ts b/packages/core/src/telemetry/loggers.test.ts
index d52cb600..a3375d95 100644
--- a/packages/core/src/telemetry/loggers.test.ts
+++ b/packages/core/src/telemetry/loggers.test.ts
@@ -162,7 +162,7 @@ describe('loggers', () => {
           file_filtering_respect_git_ignore: true,
           debug_mode: true,
           mcp_servers: 'test-server',
-          mcp_servers_count: '1',
+          mcp_servers_count: 1,
           mcp_tools: undefined,
           mcp_tools_count: undefined,
         },
diff --git a/packages/core/src/telemetry/types.ts b/packages/core/src/telemetry/types.ts
index 8b1b5d68..9310992c 100644
--- a/packages/core/src/telemetry/types.ts
+++ b/packages/core/src/telemetry/types.ts
@@ -39,8 +39,8 @@ export class StartSessionEvent implements BaseTelemetryEvent {
   telemetry_enabled: boolean;
   telemetry_log_user_prompts_enabled: boolean;
   file_filtering_respect_git_ignore: boolean;
-  mcp_servers_count?: string;
-  mcp_tools_count?: string;
+  mcp_servers_count: number;
+  mcp_tools_count?: number;
   mcp_tools?: string;
 
   constructor(config: Config, toolRegistry?: ToolRegistry) {
@@ -70,14 +70,12 @@ export class StartSessionEvent implements BaseTelemetryEvent {
       config.getTelemetryLogPromptsEnabled();
     this.file_filtering_respect_git_ignore =
       config.getFileFilteringRespectGitIgnore();
-    this.mcp_servers_count = mcpServers
-      ? Object.keys(mcpServers).length.toString()
-      : '';
+    this.mcp_servers_count = mcpServers ? Object.keys(mcpServers).length : 0;
     if (toolRegistry) {
       const mcpTools = toolRegistry
         .getAllTools()
         .filter((tool) => tool instanceof DiscoveredMCPTool);
-      this.mcp_tools_count = mcpTools.length.toString();
+      this.mcp_tools_count = mcpTools.length;
       this.mcp_tools = mcpTools
         .map((tool) => (tool as DiscoveredMCPTool).name)
         .join(',');