No Response When Using gptel-make-tool with Zero Arguments

[norisuke3]

Description

I'm trying to create a simple tool with gptel-make-tool that takes no arguments, but I'm not getting any response when attempting to use it. When I try a similar tool that takes arguments, it works fine.

Environment

• gptel package-version: 20250306.310
• Provider: OpenRouter
• Model: anthropic/claude-3.7-sonnet

Reproduction Steps

1. Created a tool with arguments that works fine:

(gptel-make-tool
 :name "greeting_with_a_name"
 :function (lambda (name) (concat name " Hello World!"))
 :description "A simple tool that returns a greeting message."
 :args (list '(:name "name"
               :type string
               :description "the name of the person to which the greeting is made for"))
 :category "debug")

2. Created a similar tool with no arguments:

(gptel-make-tool
 :name "greeting_witout_a_name"
 :function (lambda () "Hello World!")
 :description "A simple tool that returns a greeting message."
 :args nil
 :category "debug")

Expected Behavior

The tool without arguments should respond with "Hello World!" when invoked.

Actual Behavior

When trying to use the zero-argument tool, there's no response. The OpenRouter Activity page shows no activity either, suggesting the request isn't being sent or is being rejected.

Additional Information

I suspect there might be an issue with the :args nil setting, as the only difference between the working and non-working tools is the argument handling.

Any guidance would be appreciated.

Additional context
Emacs version: GNU Emacs 30.1 (build 1, aarch64-apple-darwin21.6.0, NS appkit-2113.65 Version 12.7.6 (Build 21H1320)) of 2025-02-24
Operating system: MacOS sequoia 15.3.1

[norisuke3]

Just found that it's a model issue, not gptel. It works with the following models:
openai/gpt-4o-2024-11-20
google/gemini-2.0-flash-001

Somehow openai/o3-mini go into a loop until killing a gtpel session (OpenRouter).

The prompt used: Hello! My name is Bob!. Just show a string returned from a tool 'greeting_without_a_name' withtout any change. No additional sentence is required.

A screen shot of Openrouter activity

*gptel-curl*

HTTP/2 200 
date: Sat, 08 Mar 2025 20:32:34 GMT
content-type: text/event-stream
access-control-allow-origin: *
cache-control: no-cache
x-clerk-auth-message: Invalid JWT form. A JWT consists of three parts separated by dots. (reason=token-invalid, token-carrier=header)
x-clerk-auth-reason: token-invalid
x-clerk-auth-status: signed-out
vary: Accept-Encoding
server: cloudflare
cf-ray: 91d51a436fb9cf0e-SJC

: OPENROUTER PROCESSING

: OPENROUTER PROCESSING

: OPENROUTER PROCESSING

: OPENROUTER PROCESSING

: OPENROUTER PROCESSING

: OPENROUTER PROCESSING

: OPENROUTER PROCESSING

: OPENROUTER PROCESSING

: OPENROUTER PROCESSING

: OPENROUTER PROCESSING

: OPENROUTER PROCESSING

It also might not be an issue of gptel.

[norisuke3]

Hi there,

One question remaining is that somehow I don't see any activity log on OpenRouter when choosing anthropic/claude-3.7-sonnet and anthropic/claude-3.5-sonnet. I did the same thing with gemini flash 2.0 and gpt-4o which are recorded there.

Thanks!

[karthink]

Could be gptel+OpenAI specific. Does the no-args tool work with gpt-4o-mini?

One question remaining is that somehow I don't see any activity log on OpenRouter when choosing anthropic/claude-3.7-sonnet and anthropic/claude-3.5-sonnet. I did the same thing with gemini flash 2.0 and gpt-4o which are recorded there.

I don't use OpenRouter so I don't know what you mean, sorry.

[norisuke3]

Thank you for your response, @karthink! I appreciate your engagement with my issue and want to express my gratitude for the gptel package; it's truly a fantastic tool.

I have conducted further investigation into the issues I encountered:

1. Looping Issue:

   • Happened with: OpenRouter: openai/o3-mini
   • Not happened with: ChatGPT: gpt-4o-mini, o3-mini; OpenRouter: openai/gpt-4o-mini

2. No Response for Zero-Argument Tool:

   • Happened with: OpenRouter: anthropic/claude-3.7-sonnet, anthropic/claude-3.5-sonnet; Claude: claude-3-5-sonnet-20241022
   • Not happened with: Claude: claude-3-7-sonnet-20250219, OpenRouter: openai/gpt-4o-2024-11-20, google/gemini-2.0-flash-001

Interestingly, when testing the claude-3-7-sonnet-20250219 model with some prompts, I received responses indicating a limitation:

• Prompt: "Hello! My name is Bob!"
  • Response: "I notice you've shared your name, but I don't have a personalized greeting tool that takes a name parameter. I do have a simple greeting tool I can use if you'd like to see a general greeting message."

It appears that even when a name was provided, the tool couldn't respond as intended due to the lack of a tool that accepts name parameters.

In summary, the looping issue seems specific to the OpenRouter's o3-mini, while the no-response issue with zero-argument tools seems to relate to how certain models handle greeting tools.

Thank you again for your assistance!