GreatEugenius opened a new pull request, #854:
URL: https://github.com/apache/flink-agents/pull/854
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Linked issue: #853
### Purpose of change
Support tool parameter injection for function tools.
This change lets framework-owned arguments, such as tenant id or request
context, be injected at tool execution time without exposing them to the
model-facing tool schema.
Main changes:
- Add Python API support:
- `@tool(injected_args=[...])`
- `@before_tool_call`
- `@after_tool_call`
- Add Java API support:
- `@ToolParam(injected = true)`
- `@BeforeToolCall`
- `@AfterToolCall`
- Inject parameters in the built-in `tool_call_action`, after reading model
arguments and before invoking the tool.
- Preserve `injected_args` in the plan/runtime representation while
filtering injected parameters from model metadata.
- Add YAML API support:
- `tools[].injected_args`
- `before_tool_call`
- `after_tool_call`
- Keep cross-language tool calls supported, but explicitly reject
cross-language tool-call hooks in YAML because hooks execute directly inside
the host-language built-in `tool_call_action`.
### Tests
UT & E2E Test
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### API
Yes
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### Documentation
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- [ ] `doc-needed` <!-- Your PR changes impact docs -->
- [ ] `doc-not-needed` <!-- Your PR changes do not impact docs -->
- [x] `doc-included` <!-- Your PR already contains the necessary
documentation updates -->
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