stream_add · Amazon ElastiCache Memcached MCP Server MCP

WHAT IT DOES

What stream_add does on Amazon ElastiCache Memcached MCP Server

AI agents use stream_add to create or update resources in Amazon ElastiCache Memcached MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Amazon ElastiCache Memcached MCP Server environment.

WHY IT NEEDS A POLICY

Why stream_add needs a policy

Without a description, confidence is reduced, but the naming convention and sibling tools on this ElastiCache server strongly suggest this creates or modifies cache stream data reversibly. This is a Write operation (data modification) rather than Read (no side effects), Execute (arbitrary code), Destructive (irreversible deletion), or Financial.

From the tool's definition Tool name 'stream_add' suggests adding data to a stream in ElastiCache Memcached context. The empty description prevents full certainty, but the 'add' verb and sibling pattern (e.g., 'add_attachments_to_set', 'add_inline_policy', 'add_user_to_group')…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

stream_add Rate-limited

stream_add stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. 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": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Amazon ElastiCache Memcached MCP Server, so you can run agents against it safely.

FAQ

Questions about stream_add

What does the stream_add tool do? +

stream_add. It is categorised as a Write tool in the Amazon ElastiCache Memcached MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on stream_add? +

Register the Amazon ElastiCache Memcached MCP Server 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 Amazon ElastiCache Memcached MCP Server. Nothing to install.

What risk level is stream_add? +

stream_add is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

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 Amazon ElastiCache Memcached MCP Server MCP server (awslabs.memcached-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.