s3-management

---
name: s3-management
description: Manage AWS S3 buckets and objects via MCP. Use when asked to browse, upload, download, or share S3 files.
license: MIT
---

# AWS S3 Management via MCP

Use this skill when you need to manage S3 buckets, browse objects, upload/download files, or generate presigned URLs.

## Available Tools

| Tool | What it does |
|------|-------------|
| `list_buckets` | List all S3 buckets in the AWS account |
| `list_objects` | List objects in a bucket with optional prefix filter |
| `get_object` | Download and read an object's content as text |
| `put_object` | Upload text content to an S3 object |
| `delete_object` | Delete an object from a bucket |
| `presigned_url` | Generate a temporary presigned URL for an object |
| `bucket_info` | Check if a bucket exists and get basic info |

## Workflow

1. Start with `list_buckets` to discover available buckets
2. Use `list_objects` with a prefix to browse directories within a bucket
3. `get_object` reads text content — for binary files, use `presigned_url` instead
4. `presigned_url` generates a temporary shareable link (default 1 hour expiry)

## Key Patterns

- `list_objects` uses prefix-based filtering (S3 doesn't have real directories): `prefix: "uploads/2026/"` 
- `get_object` returns text content only — it won't work for images, binaries, or large files
- `put_object` takes string content — use it for config files, JSON, text, not binary uploads
- `presigned_url` is the right tool for sharing files or accessing binary content

## Safety

- Always confirm before `delete_object` — S3 deletions are permanent (unless versioning is enabled)
- Always confirm before `put_object` to an existing key — it overwrites without warning
- Presigned URLs grant temporary access to anyone with the link — warn users about this