Toolschecker

Google Gemini for Structured Output / JSON Mode

Validate JSON schemas against model outputs to catch compatibility issues before deployment

Try the tool

client runner

Validation Results

Run the tool to see output.

Examples

Valid Gemini Output

{
  "schema": "{\"type\": \"object\", \"properties\": {\"title\": {\"type\": \"string\"}}, \"required\": [\"title\"]}",
  "model_output": "{\"title\": \"Test Article\"}",
  "provider": "Gemini"
}

Expected output

{"valid": true, "errors": []}

Invalid Qwen Output

{
  "schema": "{\"type\": \"object\", \"properties\": {\"content\": {\"type\": \"string\"}}, \"required\": [\"content\"]}",
  "model_output": "{\"meta\": {\"status\": \"ok\"}, \"content\": \"Valid text\"}",
  "provider": "Qwen"
}

Expected output

{"valid": false, "errors": ["Envelope structure mismatch"]}

How it works

Analyzes provided JSON schema and model output against provider-specific validation rules. Checks for type consistency, required fields, and envelope structure compliance. Returns detailed validation results including error locations.

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