sorted_set_add_incr

THE RISK

Medium Risk

Why sorted_set_add_incr needs a policy

This tool creates or modifies data in a sorted set by adding members or incrementing their scores. These are reversible write operations (not destructive deletions), and no code execution or financial transactions are involved. The medium severity reflects that misuse could corrupt or pollute data structures, but changes can be undone by removing members or decrementing scores.

From the tool's definition Tool name 'sorted_set_add_incr' and description 'Add member to sorted set or increment its score' indicate modification of data in a sorted set (likely Redis or similar data structure).

Documented attack patterns abuse exactly the kind of access sorted_set_add_incr gives an agent:

POLICY

How to control sorted_set_add_incr

PolicyLayer is an MCP gateway — it sits between your AI agents and Amazon Redshift MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for sorted_set_add_incr:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "sorted_set_add_incr": {
      "limits": [
        {
          "counter": "sorted_set_add_incr_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

sorted_set_add_incr 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.

Create a free account and register Amazon Redshift MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

Govern customer-ops agents → PII redaction, approval on external messages, and no-bulk-delete rules on the records agents change.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →
PolicyLayer vs alternatives → How deterministic, per-call MCP policy compares with gateways, identity layers, and authorisation platforms.

FAQ

Questions about sorted_set_add_incr

What does the sorted_set_add_incr tool do? +

Add member to sorted set or increment its score. It is categorised as a Write tool in the Amazon Redshift 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 sorted_set_add_incr? +

Register the Amazon Redshift MCP Server MCP server in PolicyLayer and add a rule for sorted_set_add_incr: 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 Redshift MCP Server. Nothing to install.

What risk level is sorted_set_add_incr? +

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

Can I rate-limit sorted_set_add_incr? +

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

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

sorted_set_add_incr is provided by the Amazon Redshift MCP Server MCP server (awslabs.redshift-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Amazon Redshift MCP Server tool call.

Start from Amazon Redshift MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →