S3 MCP Server
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| AWS_REGION | No | AWS region (default: ap-northeast-2) | ap-northeast-2 |
| CONTENT_TYPE | No | Default MIME type for uploads/downloads (default: application/octet-stream) | application/octet-stream |
| S3_BUCKET_NAME | No | S3 bucket name (default: my-dancing-bucket) | my-dancing-bucket |
| AWS_ACCESS_KEY_ID | Yes | Your AWS access key ID | |
| AWS_SECRET_ACCESS_KEY | Yes | Your AWS secret access key |
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Features and capabilities supported by this server
Protocol revision2025-11-25
| Capability | Details |
|---|---|
| tools | {
"listChanged": true
} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| get_objectD | – |
| list_bucketsD | – |
| upload_fileD | – |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
TDQS
Scored across 3 tools
Each tool targets a distinct S3 action (get object, list buckets, upload file) with no overlap. Even without descriptions, the names clearly differentiate the operations.
All tool names follow a consistent verb_noun pattern with snake_case (get_object, list_buckets, upload_file), making them predictable and easy to understand.
With 3 tools, the server is slightly under-scoped for a typical S3 service, but it covers core operations. The count is still within a reasonable range for a focused utility.
The tool set is missing essential S3 operations like delete_object, list_objects, and copy_object. These omissions create significant gaps that would hinder an agent performing common storage tasks.