security_set

SERVEROpen Mcp Apps SOURCE@2nd1st/open-mcp-apps

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/2nd1st-open-mcp-apps/security-set.md

WHAT IT DOES

What security_set does on Open Mcp Apps

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

RISK

Why security_set is rated Medium

This tool creates or modifies data reversibly by upserting security and policy settings. While it affects security-critical configuration keys, it does not delete data (which would be Destructive) nor execute arbitrary code (which would be Execute). It is a Write operation with elevated privileges over reserved namespaces.

From the tool's definition Tool description states it 'Privileged writer for reserved settings keys (security:* / policy:*)' and 'Upserts one key/value in the settings collection.' The terms 'writer' and 'upserts' indicate data modification capability.

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs security_set safely

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

security_set Rate-limited

security_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": {
    "security_set": {
      "limits": [
        {
          "counter": "security_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 Open Mcp Apps, apply this rule, and every security_set call is checked against it from then on.

FAQ

Questions about security_set

What does the security_set tool do? +

Privileged writer for reserved settings keys (security:* / policy:*) — the ONLY tool that can write them; the generic data_* tools refuse reserved keys. Upserts one key/value in the settings collection. It is categorised as a Write tool in the Open Mcp Apps MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on security_set? +

Register the Open Mcp Apps MCP server in PolicyLayer and add a rule for security_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 Open Mcp Apps. Nothing to install.

What risk level is security_set? +

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

Can I rate-limit security_set? +

Yes. Add a rate_limit block to the security_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 security_set completely? +

Set action: deny in the PolicyLayer policy for security_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 security_set? +

security_set is provided by the Open Mcp Apps MCP server (@2nd1st/open-mcp-apps). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Open Mcp Apps, and thousands of servers like it.

This server

All 32 Open Mcp Apps tools →

Across the catalogue

platform_security_review on 05 Mcp A2a Solution Studio →emit_assumption_set on 0sec →set-prioity on Kanban MCP Server → The MCP Attack Database →

Guides

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