diff --git a/packages/cli/src/mcpserver.ts b/packages/cli/src/mcpserver.ts
index 6fb0273602..38990f764b 100644
--- a/packages/cli/src/mcpserver.ts
+++ b/packages/cli/src/mcpserver.ts
@@ -78,7 +78,14 @@ export async function startMcpServer(
         dbg(`fetching scripts from watcher`)
         const scripts = await watcher.scripts()
         const tools = scripts.map((script) => {
-            const { id, title, description, inputSchema, accept } = script
+            const {
+                id,
+                title,
+                description,
+                inputSchema,
+                accept,
+                annotations = {},
+            } = script
             const scriptSchema = (inputSchema?.properties
                 .script as JSONSchemaObject) || {
                 type: "object",
@@ -94,9 +101,13 @@ export async function startMcpServer(
                 }
             return {
                 name: id,
-                description: toStringList(title, description),
+                description,
                 inputSchema:
                     scriptSchema as ListToolsResult["tools"][0]["inputSchema"],
+                annotations: {
+                    ...annotations,
+                    title,
+                },
             } satisfies ListToolsResult["tools"][0]
         })
         dbg(`returning tool list with ${tools.length} tools`)
diff --git a/packages/core/src/types/prompt_template.d.ts b/packages/core/src/types/prompt_template.d.ts
index c57ab065d2..8bc70b0776 100644
--- a/packages/core/src/types/prompt_template.d.ts
+++ b/packages/core/src/types/prompt_template.d.ts
@@ -752,6 +752,31 @@ interface ModelTemplateOptions extends FenceFormatOptions {
     flexTokens?: number
 }
 
+interface McpToolAnnotations {
+    /**
+     * Annotations for MCP tools
+     * @link https://modelcontextprotocol.io/docs/concepts/tools#available-tool-annotations
+     */
+    annotations?: {
+        /**
+         * If true, indicates the tool does not modify its environment
+         */
+        readOnlyHint?: boolean
+        /**
+         * If true, the tool may perform destructive updates (only meaningful when readOnlyHint is false)
+         */
+        destructiveHint?: boolean
+        /**
+         * If true, calling the tool repeatedly with the same arguments has no additional effect (only meaningful when readOnlyHint is false)
+         */
+        idempotentHint?: boolean
+        /**
+         * If true, the tool may interact with an “open world” of external entities
+         */
+        openWorldHint?: boolean
+    }
+}
+
 interface PromptScript
     extends PromptLike,
         ModelOptions,
@@ -761,7 +786,8 @@ interface PromptScript
         ContentSafetyOptions,
         SecretDetectionOptions,
         GitIgnoreFilterOptions,
-        ScriptRuntimeOptions {
+        ScriptRuntimeOptions,
+        McpToolAnnotations {
     /**
      * Which provider to prefer when picking a model.
      */