Locates existing tests for a given C# class and method using the test coverage data supplied by IDE. Triggers ONLY for C# production code (`.cs` files in a Rider .NET solution) when generating new tests, adding test coverage, finding existing tests, or when the user mentions uncovered lines, test files, or test suites. Must be used before writing or editing C# test code when finding already existing tests is necessary. Do NOT invoke for non-C# languages — the underlying tool only understands C# symbols and will not return useful results.
