llama-stack/llama_stack
Ben Browning c64f0d5888
fix: Get builtin tool calling working in remote-vllm (#1236)
# What does this PR do?

This PR makes a couple of changes required to get the test
`tests/client-sdk/agents/test_agents.py::test_builtin_tool_web_search`
passing on the remote-vllm provider.

First, we adjust agent_instance to also pass in the description and
parameters of builtin tools. We need these parameters so we can pass the
tool's expected parameters into vLLM. The meta-reference implementations
may not have needed these for builtin tools, as they are able to take
advantage of the Llama-model specific support for certain builtin tools.
However, with vLLM, our server-side chat templates for tool calling
treat all tools the same and don't separate out Llama builtin vs custom
tools. So, we need to pass the full set of parameter definitions and
list of required parameters for builtin tools as well.

Next, we adjust the vllm streaming chat completion code to fix up some
edge cases where it was returning an extra ChatCompletionResponseEvent
with an empty ToolCall with empty string call_id, tool_name, and
arguments properties. This is a bug discovered after the above fix,
where after a successful tool invocation we were sending extra chunks
back to the client with these empty ToolCalls.

## Test Plan

With these changes, the following test that previously failed now
passes:

```
VLLM_URL="http://localhost:8000/v1" \
INFERENCE_MODEL="meta-llama/Llama-3.2-3B-Instruct" \
LLAMA_STACK_CONFIG=remote-vllm \
python -m pytest -v \
tests/client-sdk/agents/test_agents.py::test_builtin_tool_web_search \
--inference-model "meta-llama/Llama-3.2-3B-Instruct"
```

Additionally, I ran the remote-vllm client-sdk and provider inference
tests as below to ensure they all still passed with this change:

```
VLLM_URL="http://localhost:8000/v1" \
INFERENCE_MODEL="meta-llama/Llama-3.2-3B-Instruct" \
LLAMA_STACK_CONFIG=remote-vllm \
python -m pytest -v \
tests/client-sdk/inference/test_text_inference.py \
--inference-model "meta-llama/Llama-3.2-3B-Instruct"
```

```
VLLM_URL="http://localhost:8000/v1" \
python -m pytest -s -v \
llama_stack/providers/tests/inference/test_text_inference.py \
--providers "inference=vllm_remote"
```


[//]: # (## Documentation)

Signed-off-by: Ben Browning <bbrownin@redhat.com>
2025-02-26 15:25:47 -05:00
..
apis ci: add mypy for static type checking (#1101) 2025-02-21 13:15:40 -08:00
cli fix(cli): Missing default for --image-type in stack run command (#1274) 2025-02-26 12:23:44 -08:00
distribution refactor(server): replace print statements with logger (#1250) 2025-02-25 21:31:37 -08:00
models/llama chore: move all Llama Stack types from llama-models to llama-stack (#1098) 2025-02-14 09:10:59 -08:00
providers fix: Get builtin tool calling working in remote-vllm (#1236) 2025-02-26 15:25:47 -05:00
scripts ci: add mypy for static type checking (#1101) 2025-02-21 13:15:40 -08:00
strong_typing Ensure that deprecations for fields follow through to OpenAPI 2025-02-19 13:54:04 -08:00
templates fix: make vision and embedding tests pass with openai, anthropic and gemini 2025-02-26 11:24:01 -08:00
__init__.py export LibraryClient 2024-12-13 12:08:00 -08:00
schema_utils.py ci: add mypy for static type checking (#1101) 2025-02-21 13:15:40 -08:00