When using Grok 4.5 in Cursor Agent, the model cannot access the AskQuestion tool. If prompted to use it, the model reports that the tool is not available and suggests switching to Plan mode, but Plan mode behaves the same way.
Composer 2.5 can access AskQuestion normally. Even when Composer 2.5 provides explicit instructions for Grok to call AskQuestion, Grok still cannot use it and asks questions inline in chat instead.
This looks like a model-specific tool availability or routing issue, not a user workflow problem.
Steps to Reproduce
Open Cursor Agent and select Grok 4.5 as the model.
Start a task where the agent needs a structured user choice (e.g. “Use AskQuestion to ask me which authentication approach to use”).
Observe Grok’s response.
Also tested:
Switch to Plan mode with Grok 4.5 and repeat step 2.
Switch to Composer 2.5, run the same prompt — AskQuestion works.
Ask Composer 2.5 to produce exact instructions for Grok on how/when to call AskQuestion.
Start a new Grok 4.5 session with those instructions.
Grok still does not call AskQuestion; it asks the same questions inline in prose.
Expected Behavior
Grok 4.5 should have access to the same AskQuestion tool as Composer 2.5 when the tool is enabled for the session.
When appropriate, Grok should invoke AskQuestion with structured multiple-choice options instead of asking inline in chat.
Plan mode should not be suggested as a workaround if the tool is equally unavailable there.
Grok 4.5 in Plan Mode appears unable to use the AskQuestion tool. When I ask it to list available tools, AskQuestion is missing. If I switch the same chat/task to Composer 2.5 or another model, AskQuestion is available and used correctly.
Steps to Reproduce
Open Cursor.
Start a new Agent/Plan Mode chat.
Select Grok 4.5.
Ask: “List the exact tools available to you.”
Ask it to clarify requirements using the AskQuestion tool.
Switch to Composer 2.5 and repeat.
Expected Behavior
Grok 4.5 should have access to the same Cursor internal planning tools as other supported models, including AskQuestion.
Tried many times but the AskQuestion tool seems to fail with Grok 4.5.
It tries and say it’s not in its native tool list and cant find the tool. As soon as I switch to composer 2.5 in the exact same chat it’s able to use it. Official docs says the tool is available for Grok 4.5
Steps to Reproduce
Ask to use the AskQuestion tool in a session
Expected Behavior
Being able to construct and let user pick from multiple choice.
Hey,
This is expected behavior right now, not a bug. Grok 4.5 currently asks clarifying questions inline in its responses instead of using the structured AskQuestion picker, and this is true in every mode, including Plan mode. You’re right that the Grok 4.5 docs list it as having all agent tools - that’s a bit ahead of reality for AskQuestion specifically at the moment.
If you want the interactive multiple-choice picker for a step, switch to Composer 2.5 (or another non-Grok model), exactly as you found. We’re working on re-enabling AskQuestion for Grok 4.5. A couple of others are tracking the same thing here.
Hi @ESCO Thanks for the post! This is expected with Grok 4.5 right now.
The structured question picker (AskQuestion) is intentionally not available for Grok 4.5, including in Plan mode. When it needs clarification, it asks inline in the chat instead.
If you want the multiple-choice question UI, switch to Composer 2.5 (or another model that still has that tool). Plan mode itself is fine; this is specific to Grok 4.5.
We plan to support the Ask Question tool in the future! We are not deprecating it or anything. Right now, it is a limitation specific to the Cursor Grok model, but we’ll let you know if anything changes.
Cursor agent is saying that it does not have AskQuestion tool
Steps to Reproduce
Enter plan mode → ask for plan → the agent does not use AskQuestion → ask it "why didn’t it use ask tool → agent answered that:
I tried — in that turn AskQuestion wasn’t available (the call failed with “Tool not found”). Plan-mode instructions here also say to ask clarifying questions inline, not via an ask tool.
When using Grok 4.5 in Plan Mode, the model sometimes writes out its clarifying questions (like “which option do you want, A, B, or C”) directly as plain text in the chat window, instead of using Cursor’s built in question prompt UI (the one with selectable options).
We’re still evaluating whether we can bring AskQuestion to Grok 4.5. During training, we found that the model often overuses this tool, and we’ve been exploring ways to get the behavior right. If we can’t resolve this in Grok 4.5 (and we’re still working on it) it will be addressed in a future model release.
I have internal skills that rely on AskQuestion, and they work perfectly when I use Composer. However, when I switch to Grok 4.5, they do not work. Is this expected behavior? Grok 4.5 does not seem to be able to invoke Cursor’s built-in tools, which limits its usefulness for agent workflows.
Steps to Reproduce
Create or use an internal Cursor skill that invokes the AskQuestion tool.
Open the skill in Composer and verify that it works correctly.
Switch the model to Grok 4.5.
Run the exact same skill.
Observe that the AskQuestion tool is never invoked, and the workflow cannot continue.
Expected Behavior
Grok 4.5 should be able to invoke Cursor’s internal tools (such as AskQuestion) in the same way as other supported models.
