diff --git a/packages/codemode/src/tool-runtime.ts b/packages/codemode/src/tool-runtime.ts
index 8f76f6c0d7..8a80493fec 100644
--- a/packages/codemode/src/tool-runtime.ts
+++ b/packages/codemode/src/tool-runtime.ts
@@ -615,8 +615,8 @@ export const prepare = <R>(tools: HostTools<R>, catalogBudget = defaultCatalogBu
     "",
     "## Language",
     "",
-    "Use common JavaScript data operations, functions, control flow, selected standard-library methods, and tool calls. Promises support await, then/catch/finally, and Promise.all/allSettled/race/resolve/reject. Built-ins include Date, RegExp, Map, Set, URL, URLSearchParams, and URI encoding helpers.",
-    "Modules/imports, classes, generators, timers, fetch, eval, prototype access, and unlisted methods are unavailable. Use Code Mode tools for external operations.",
+    "Use common JavaScript data operations, functions, control flow, selected standard-library methods, and awaited tool calls. Built-ins include Date, RegExp, Map, Set, URL, URLSearchParams, and URI encoding helpers.",
+    "Modules/imports, classes, generators, timers, fetch, eval, prototype access, and unlisted methods are unavailable. Use Code Mode tools for external operations. Use await with try/catch.",
     "Dates and URLs serialize to strings at data boundaries; Map/Set/RegExp/URLSearchParams serialize to `{}`.",
   ]
 
diff --git a/packages/codemode/test/codemode.test.ts b/packages/codemode/test/codemode.test.ts
index 92677f34f4..d69fcb11de 100644
--- a/packages/codemode/test/codemode.test.ts
+++ b/packages/codemode/test/codemode.test.ts
@@ -655,7 +655,9 @@ describe("CodeMode public contract", () => {
     for (const missing of ["Modules/imports", "classes", "generators", "fetch"]) {
       expect(instructions).toContain(missing)
     }
-    expect(instructions).toContain("Promises support await, then/catch/finally")
+    expect(instructions).toContain("selected standard-library methods, and awaited tool calls")
+    expect(instructions).toContain("Use await with try/catch")
+    expect(instructions).not.toContain("promise chaining are unavailable")
     expect(instructions).toContain("URL, URLSearchParams, and URI encoding helpers")
     expect(instructions).not.toContain("host globals")
     expect(instructions).toContain("Use Code Mode tools for external operations")
diff --git a/packages/core/test/mcp.test.ts b/packages/core/test/mcp.test.ts
index c6146e4c9f..0a63188a96 100644
--- a/packages/core/test/mcp.test.ts
+++ b/packages/core/test/mcp.test.ts
@@ -184,7 +184,6 @@ it.effect("advertises MCP output schemas to Code Mode", () =>
     const execute = (yield* toolDefinitions(registry)).find((tool) => tool.name === "execute")
 
     expect(execute?.description).toContain("tools.demo.search(input: {}): Promise<{\n  ok: boolean,\n}>")
-    expect(execute?.description).toContain("Promises support await, then/catch/finally")
     expect(execute?.description).not.toContain("promise chaining are unavailable")
   }),
 )