JSON schema conversion failed

[k33g]

If I add this to the toolsets:

          greetings:
            description: A simple script that prints a greeting message with a parameter.
            cmd: echo "🍺 Greetings, $name! 🤓"
            args:
              name:
                description: "The name of the person to greet"

So this is my new toolsets:

    toolsets:
      - type: filesystem
        instruction: |
          You have access to filesystem tools to read, edit, and write files. Use these tools for all file operations.
          - read: Read file contents
          - edit: Make surgical edits to files (find exact text and replace)
          - write: Create or overwrite files
      - type: shell
        instruction: |
          You can execute bash commands to explore the filesystem and gather information. 
          Use this for tasks like listing files, searching with grep, or finding files with find.
          - bash: Execute bash commands (ls, grep, find, etc.)
      
      - type: script
        shell:
          say_hello:
            description: A simple script that prints a greeting message.
            cmd: echo "👋 Hello, World! 😉"   
          say_hey:
            description: A simple script that prints a greeting message.
            cmd: echo "🎉 Hey there! 🤓" 

          greetings:
            description: A simple script that prints a greeting message with a parameter.
            cmd: echo "🍺 Greetings, $name! 🤓"
            args:
              name:
                description: "The name of the person to greet"

I'm using the DMR provider, and did the test with models with JSON output support:

• huggingface.co/menlo/jan-nano-128k-gguf:Q4_K_M
• huggingface.co/unsloth/qwen3-8b-gguf:Q4_K_M

cagent version: 1.27.0

I get this error with any prompt:

all models failed: error receiving from stream: POST "http://model-runner.docker.internal/engines/v1/chat/completions": 400 Bad Request
{"code":400,"message":"JSON schema conversion failed:\nUnrecognized schema: {\"description\":\"The name of the person to greet\"}\nUnrecognized schema:
{\"description\":\"The name of the person to greet\"}","type":"invalid_request_error"}

If I remove the greetings tool, all is ok

it seems there is an issue with the arguments of the command

[k33g]

Tested, it works as expected 👍