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[flake8-annotations] Clarify that ANN401 checks return types in addition to arguments #28334

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ntBre merged 1 commit into from
Sep 17, 2026
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[flake8-annotations] Clarify that ANN401 checks return types in addition to arguments #28334

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8 changes: 4 additions & 4 deletions crates/ruff_linter/src/rules/flake8_annotations/rules/definition.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -486,8 +486,8 @@ impl Violation for MissingReturnTypeClassMethod {
}

/// ## What it does
/// Checks that function arguments are annotated with a more specific type than
/// `Any`.
/// Checks that function arguments and return values are annotated with a more
/// specific type than `Any`.
///
/// ## Why is this bad?
/// `Any` is a special type indicating an unconstrained type. When an
Expand All @@ -503,13 +503,13 @@ impl Violation for MissingReturnTypeClassMethod {
/// from typing import Any
///
///
/// def foo(x: Any): ...
/// def foo(x: Any) -> Any: ...
/// ```
///
/// Use instead:
///
/// ```python
/// def foo(x: int): ...
/// def foo(x: int) -> int: ...
/// ```
///
/// ## Known problems
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