cloudflare/ai workers-ai-provider@3.1.6

workers-ai-provider@3.1.6

Repository: cloudflare/ai

Tag: workers-ai-provider@3.1.6

Published: 2026-03-22T10:12:43Z

Prerelease: no

Release notes:

Patch Changes

• #454 `29087ad` Thanks @mchenco! - Fix three tool calling bugs that caused multi-turn agentic loops to fail

1. Tool result output not unwrapped

convert-to-workersai-chat-messages.ts was calling JSON.stringify(toolResponse.output) on the entire LanguageModelV3ToolResultOutput wrapper object ({ type: 'text', value: '...' }), sending the wrapper as the tool message content instead of just the value. Models received garbled tool results and stopped after the first tool call instead of continuing.

Fix: extract output.value and serialize only that.

2. `toolChoice: "required"` mapped to `"any"` instead of `"required"`

utils.ts mapped toolChoice: "required" to tool_choice: "any". All vLLM-backed models (@cf/moonshotai/kimi-k2.5, @cf/meta/llama-4-scout-17b-16e-instruct, @cf/zai-org/glm-4.7-flash) return 8001: Invalid input for tool_choice: "any". The same incorrect mapping applied to toolChoice: { type: "tool" }.

Fix: map both to "required".

3. `description: false` in tool definitions

utils.ts used && short-circuit for tool description and parameters, which evaluates to false (not undefined) when tool.type !== "function". Sending description: false to the binding causes 8001: Invalid input.

Fix: use ternary to produce undefined when not applicable.

Tested against @cf/moonshotai/kimi-k2.5, @cf/meta/llama-4-scout-17b-16e-instruct, and @cf/zai-org/glm-4.7-flash via the Workers AI binding.