expire

Set an expiration time for a Redis key. Args: name: The Redis key. expire_seconds: Time in seconds after which the key should expire. Returns: A success message or an error message.

SERVERAWS SOURCE@awslabs/mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity verified Pull the record →

This record as markdown: /tools/aws/expire.md

WHAT IT DOES

What expire does on AWS

AI agents use expire to create or update resources in AWS, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your AWS environment.

RISK

Why expire is rated Medium

This tool modifies Redis key TTL (time-to-live) metadata, which is a reversible write operation. It does not delete data immediately, but rather schedules automatic expiration. An AI misusing this could inadvertently expire critical cache entries, breaking application functionality or causing data loss after expiration.

From the tool's definition Tool sets an expiration time for a Redis key, modifying key metadata. Description states it configures expiration behavior: 'Set an expiration time for a Redis key' with arguments for the key name and expire_seconds duration.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs expire 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 expire, this is the rule to start with:

expire Rate-limited

expire 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": {
    "expire": {
      "limits": [
        {
          "counter": "expire_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about expire

What does the expire tool do? +

Set an expiration time for a Redis key. Args: name: The Redis key. expire_seconds: Time in seconds after which the key should expire. Returns: A success message or an error message. It is categorised as a Write tool in the AWS MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on expire? +

Register the AWS MCP server in PolicyLayer and add a rule for expire: 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 expire? +

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

Can I rate-limit expire? +

Yes. Add a rate_limit block to the expire 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 expire completely? +

Set action: deny in the PolicyLayer policy for expire. 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 expire? +

expire 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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