Fix calling AI functions with no parameters

[heyitsaamir]

We wrap our AI functions such that we can call the AI plugins etc.
But if there are no parameters, we call the function like foo(). However, the wrapped function always has 1 positional argument. So python throws. This fixes that bug.

PR Dependency Tree

• PR Fix calling AI functions with no parameters #221 👈
  • PR Improve dialog opening and card submitting semantics #222

This tree was auto-generated by Charcoal

[Copilot]

Pull request overview

This PR fixes a bug where AI functions with no parameters would fail when wrapped with plugin hooks. The issue occurred because the wrapped function always expected a positional argument (params), but functions with parameter_schema=None are called without arguments, causing Python to throw a TypeError.

Key Changes

• Modified _wrap_function_handler to accept parameter_schema parameter and return a no-argument lambda wrapper when parameter_schema is None
• Added comprehensive test coverage for no-parameter functions with plugins
• Fixed unrelated documentation error in HttpPlugin example

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
packages/ai/src/microsoft/teams/ai/chat_prompt.py	Added parameter_schema parameter to _wrap_function_handler and implemented lambda wrapper for no-parameter functions to fix the bug
packages/ai/tests/test_chat_prompt.py	Added new test case test_function_with_no_parameters_wrapped_with_plugins to verify the fix works correctly with plugins
packages/apps/src/microsoft/teams/apps/http_plugin.py	Removed invalid app_id parameter from documentation example (unrelated documentation fix)

Comments suppressed due to low confidence (1)

packages/ai/src/microsoft/teams/ai/chat_prompt.py:210

• The docstring is missing documentation for the newly added parameter_schema parameter. Please add it to the Args section:

Args:
    original_handler: The original function handler to wrap
    function_name: Name of the function for plugin identification
    parameter_schema: Type schema for function parameters, or None if function has no parameters

Returns:
    Wrapped handler that includes plugin hook execution

        """
        Wrap a function handler with plugin before/after hooks.

        Creates a new handler that executes plugin hooks before and after
        the original function, allowing plugins to modify parameters and results.

        Args:
            original_handler: The original function handler to wrap
            function_name: Name of the function for plugin identification

        Returns:
            Wrapped handler that includes plugin hook execution
        """