set

Set a Redis key-value pair

SERVERRedis SOURCE@@modelcontextprotocol/server-redis

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/redis/set.md

WHAT IT DOES

What set does on Redis

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

RISK

Why set is rated Medium

This tool modifies data (creates or updates key-value pairs) but the operation is reversible. It does not execute arbitrary code, delete data irreversibly, or move money. Among sibling tools (delete, get, list), SET is a write operation with medium severity due to potential for data modification in a datastore.

From the tool's definition Tool name 'set' with description 'Set a Redis key-value pair' indicates creation or modification of data. Redis SET command creates or overwrites keys, which is reversible through subsequent SET or DEL commands.

Risk signalsWrites data to Redis

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set safely

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

set Rate-limited

set 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": {
    "set": {
      "limits": [
        {
          "counter": "set_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 Redis, apply this rule, and every set call is checked against it from then on.

FAQ

Questions about set

What does the set tool do? +

Set a Redis key-value pair. It is categorised as a Write tool in the Redis MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set? +

Register the Redis MCP server in PolicyLayer and add a rule for set: 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 Redis. Nothing to install.

What risk level is set? +

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

Can I rate-limit set? +

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

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

set is provided by the Redis MCP server (@@modelcontextprotocol/server-redis). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Redis, and thousands of servers like it.

This server

All 4 Redis tools →

Across the catalogue

set-prioity on Kanban MCP Server →team_manager_set_sources on Team Manager MCP →qt_set_property on Qt → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →