// SCAN REPORT

AWS S3 MCP Server

4 tools. 1 can modify or destroy data without limits.

1 write tool that can modify data. Rate limits recommended.

Last updated: 29 Jun 2026

1 can modify or destroy data

3 read-only

4 tools total

Community server · catalogue entry verified 29/06/2026

How to control AWS S3 MCP Server ↓

TOOL MAP

What AWS S3 MCP Server exposes to your agents

Read (3) Write / Execute (1) Destructive / Financial (0)

Running more than one server? Check your whole stack →

MOST DANGEROUS TOOLS

High Risk

The most dangerous AWS S3 MCP Server tools

Write · High s3_presign_put This tool enables creating or writing new objects to S3, which is reversible (objects can be deleted).

1 of AWS S3 MCP Server's 4 tools can modify, destroy, or commit something on every call — and an agent calls them with no built-in limits.

POLICY

How to control AWS S3 MCP Server

PolicyLayer is an MCP gateway — it sits between your AI agents and AWS S3 MCP Server, and nothing reaches the server without passing your rules. These are the rules we recommend:

Rate limit write operations

{
  "s3_presign_put": {
    "limits": [
      {
        "counter": "s3_presign_put_per_hour",
        "window": "hour",
        "max": 30,
        "scope": "grant"
      }
    ]
  }
}

Prevents bulk unintended modifications from agents caught in loops.

Cap read operations

{
  "s3_list_buckets": {
    "limits": [
      {
        "counter": "s3_list_buckets_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register AWS S3 MCP Server — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON AWS S3 →

Instant setup, no code required.

FULL CATALOGUE

All 4 AWS S3 MCP Server tools

WRITE 1 tools

Write s3_presign_put Generate a presigned URL for uploading an object to S3

READ 3 tools

Read s3_list_buckets List all S3 buckets in the AWS account Read s3_list_objects List objects in an S3 bucket with optional prefix filtering Read s3_presign_get Generate a presigned URL for downloading an object from S3

FAQ

Questions about AWS S3 MCP Server

How do I prevent bulk modifications through AWS S3 MCP Server? +

The AWS S3 MCP Server server has 1 write tools including s3_presign_put. Set a rate limit in your policy -- for example, 10 calls per hour prevents an agent from making more than 10 modifications per hour. PolicyLayer enforces this at the gateway, before calls reach AWS S3 MCP Server.

How many tools does the AWS S3 MCP Server MCP server expose? +

4 tools across 2 categories: Read, Write. 3 are read-only. 1 can modify, create, or delete data.

How do I enforce a policy on AWS S3 MCP Server? +

Register the AWS S3 MCP Server MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every AWS S3 MCP Server tool call.

Deterministic rules across all 4 AWS S3 MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

ENFORCE POLICY ON AWS S3 →

Instant setup, no code required.

4 AWS S3 MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.