fix(tools): close S3 response bodies

[gaoanze888]

Related issue

Fixes #7646

Summary

S3ReaderTool consumed the StreamingBody returned by get_object() without closing it. The body is now closed in finally, so its HTTP resources are released after successful reads and after read or decode failures.

Offline regression tests exercise all three paths without requiring AWS credentials or network access.

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Verification

• Tests added or updated for the changed behavior
• Relevant tests and quality checks pass locally

PYTHONPATH=lib/crewai-tools/src:lib/crewai/src:lib/crewai-core/src \
  ../crewAI-contrib/.venv/bin/pytest \
  lib/crewai-tools/tests/tools/test_s3_reader_tool.py \
  -q -n 0 -o addopts=''
# 3 passed

../crewAI-contrib/.venv/bin/ruff check <changed files>
../crewAI-contrib/.venv/bin/ruff format --check <changed files>
../crewAI-contrib/.venv/bin/python -m compileall -q <changed files>
git diff --check

Mutation check: restoring the original unclosed read makes all three lifecycle tests fail.

Additional context

The tests provide minimal lazy-import modules because boto3 is an optional dependency; they verify the tool's read() / close() contract without contacting AWS.

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⚙️ Run configuration

Configuration used: Organization UI

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Run ID: 4b03d247-4373-4883-be9a-c375d4068099

📥 Commits

Reviewing files that changed from the base of the PR and between fb598d2 and 2784480.

📒 Files selected for processing (2)

• lib/crewai-tools/src/crewai_tools/aws/s3/reader_tool.py
• lib/crewai-tools/tests/tools/test_s3_reader_tool.py

🚧 Files skipped from review as they are similar to previous changes (2)

• lib/crewai-tools/tests/tools/test_s3_reader_tool.py
• lib/crewai-tools/src/crewai_tools/aws/s3/reader_tool.py

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📝 Walkthrough

Walkthrough

S3ReaderTool._run now closes the S3 response body after successful reads and when reading or UTF-8 decoding raises. Close-time errors do not replace the result or primary exception. Tests cover all paths.

Changes

S3 response body cleanup

Layer / File(s)	Summary
Response body cleanup and validation lib/crewai-tools/src/crewai_tools/aws/s3/reader_tool.py, lib/crewai-tools/tests/tools/test_s3_reader_tool.py	_run stores the response body and closes it in a finally block. Tests cover successful decoding, decode failures, read failures, and close failures.

Priority: ➖ Normal

Severity of issue fixed: Medium

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the primary change: closing S3 response bodies in the tool.
Description check	✅ Passed	The description includes the related issue, solution summary, verification steps, test status, and additional context. It satisfies the repository template.
Linked Issues check	✅ Passed	PASS. The change satisfies #7646. S3ReaderTool._run stores response["Body"] and calls body.close() once in finally after get_object() succeeds. The new offline tests cover successful reads, …
Out of Scope Changes check	✅ Passed	PASS. The source change directly implements response-body cleanup for #7646. The tests verify cleanup, result preservation, exception preservation, and offline execution. No unrelated changes are iden…
Docstring Coverage	✅ Passed	Docstring coverage is 85.71% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 7 functions across 2 files.

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• Create a new PR

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

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Inline comments:
In `@lib/crewai-tools/src/crewai_tools/aws/s3/reader_tool.py`:
- Line 46: Update the cleanup logic around body.close() so a close failure
cannot replace the successful result or an active read/decode exception;
suppress the close exception while preserving the original outcome. Add a
regression test covering a failing close() call.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: d9e285a1-8d74-4dd1-9e5d-a2b36ed1a220

📥 Commits

Reviewing files that changed from the base of the PR and between 0374c63 and fb598d2.

📒 Files selected for processing (2)

• lib/crewai-tools/src/crewai_tools/aws/s3/reader_tool.py
• lib/crewai-tools/tests/tools/test_s3_reader_tool.py

Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review.