stream_add

A other tool on the AWS MCP server.

SERVERAWS SOURCE@awslabs/mcp

Low RISK CLASS

Category Other

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity verified Pull the record →

This record as markdown: /tools/aws/stream-add.md

WHAT IT DOES

What stream_add does on AWS

AI agents call stream_add as a supporting operation in AWS workflows.

RISK

Why stream_add is rated Low

With no description available, I can only infer from the tool name. 'stream_add' could mean adding data to a stream (Write), adding a stream resource (Write), or something else entirely. Given sibling tools suggest AWS context with data operations, this likely involves writing/appending to a stream resource, but confidence is very low.

From the tool's definition Tool name is 'stream_add' but description is empty or uninformative.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs stream_add safely

PolicyLayer is an MCP gateway: it sits between your AI agents and AWS, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For stream_add, this is the rule to start with:

stream_add Rate-limited

stream_add gets a rate cap, and everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "stream_add": {
      "limits": [
        {
          "counter": "stream_add_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

SET A RULE FOR THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect AWS, apply this rule, and every stream_add call is checked against it from then on.

FAQ

Questions about stream_add

What does the stream_add tool do? +

stream_add is a other tool on the AWS MCP server. It is categorised as a Other tool in the AWS MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on stream_add? +

Register the AWS MCP server in PolicyLayer and add a rule for stream_add: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches AWS. Nothing to install.

What risk level is stream_add? +

stream_add is a Other tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit stream_add? +

Yes. Add a rate_limit block to the stream_add rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block stream_add completely? +

Set action: deny in the PolicyLayer policy for stream_add. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides stream_add? +

stream_add is provided by the AWS MCP server (@awslabs/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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