Issue when talking with AI assistant

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1

hi, I have set up the Google API key to use gemini flash as model to power the AI assistant, sometimes you can chat with it, but randomly this error happens and shows a portion of it in the chat as response, directus self hosted, v11.15.4

APICallError [AI_APICallError]: * GenerateContentRequest.tools[0].function_declarations[11].parameters.properties[appearance].enum: only allowed for STRING type
    at file:///directus/node_modules/.pnpm/@ai-sdk+provider-utils@4.0.4_zod@4.1.12/node_modules/@ai-sdk/provider-utils/dist/index.mjs:2347:14
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
    at async postToApi (file:///directus/node_modules/.pnpm/@ai-sdk+provider-utils@4.0.4_zod@4.1.12/node_modules/@ai-sdk/provider-utils/dist/index.mjs:2190:28)
    at async GoogleGenerativeAILanguageModel.doStream (file:///directus/node_modules/.pnpm/@ai-sdk+google@3.0.6_zod@4.1.12/node_modules/@ai-sdk/google/dist/index.mjs:1141:50)
    at async fn (file:///directus/node_modules/.pnpm/ai@6.0.25_zod@4.1.12/node_modules/ai/dist/index.mjs:6415:25)
    at async file:///directus/node_modules/.pnpm/ai@6.0.25_zod@4.1.12/node_modules/ai/dist/index.mjs:1974:24
    at async _retryWithExponentialBackoff (file:///directus/node_modules/.pnpm/ai@6.0.25_zod@4.1.12/node_modules/ai/dist/index.mjs:2233:12)
    at async streamStep (file:///directus/node_modules/.pnpm/ai@6.0.25_zod@4.1.12/node_modules/ai/dist/index.mjs:6372:15)
    at async fn (file:///directus/node_modules/.pnpm/ai@6.0.25_zod@4.1.12/node_modules/ai/dist/index.mjs:6741:9)
    at async file:///directus/node_modules/.pnpm/ai@6.0.25_zod@4.1.12/node_modules/ai/dist/index.mjs:1974:24 {
  cause: undefined,
  url: 'https://generativelanguage.googleapis.com/v1beta/models/gemini-3-flash-preview:streamGenerateContent?alt=sse',
2

Hey @franjorub!

This looks like a bug on our end. The AI tool schemas we send to the model include enum constraints on non-string type properties, which OpenAI accepts but Gemini’s API is stricter about and rejects.

I’ve opened an issue for this → AI assistant tool schemas incompatible with Gemini · Issue #26762 · directus/directus · GitHub :slight_smile: the schemas need to be provider-agnostic so they work across all supported models.