[BUG] Chat fails with Google/Gemini via OpenRouter ("property is not defined" in tool schema)

[esfomeado]

Preflight Checklist

• I have searched existing issues and this hasn't been reported yet
• I am using the latest version of Moltis
• If this happened during a chat session, I included as much full session context as possible and redacted secrets

What happened?

When sending a message in a normal chat using a Google/Gemini model via OpenRouter (e.g., openrouter::google/gemma-4-31b-it:free), the agent loop crashes with an HTTP 400 INVALID_ARGUMENT error..

Expected behavior

The request should just work

Steps to reproduce

1. Start a normal chat in Moltis.
2. Select a Google/Gemini model via OpenRouter (gemma-4-31b-it:free).
3. Send a standard greeting like "Hello".
4. The chat fails immediately with a 400 Bad Request error.

Did this happen during a chat session?

Yes

Chat session context (if applicable)

Error messages / logs

[moltis] 2026-04-14T18:51:49.916247550Z  WARN moltis_chat: agent run error run_id="52217eac-b49a-471d-b751-897b75dc4232" error=HTTP 400: {"error":{"message":"Provider returned error","code":400,"metadata":{"raw":"{\n  \"error\": {\n    \"code\": 400,\n    \"message\": \"* GenerateContentRequest.tools[0].function_declarations[12].parameters.properties[job].required[0]: property is not defined\\n* GenerateContentRequest.tools[0].function_declarations[12].parameters.properties[job].required[1]: property is not defined\\n... [truncated for brevity] ...\\n\",\n    \"status\": \"INVALID_ARGUMENT\"\n  }\n}\n","provider_name":"Google AI Studio","is_byok":false}},"user_id":"..."}

Is this a regression?

I don't know

Last working version

No response

Moltis version

20260413.03

Component

Agent / LLM providers

Install method

Docker

Operating system

Other Linux

Additional context

No response