reserve-id

THE RISK

Medium Risk

Why reserve-id needs a policy

Reserving an ID is a write operation that claims/allocates a specific object ID, preventing others from using it. It creates or modifies allocation state in the system. It is reversible (reservations can typically be released), so it doesn't qualify as Destructive. Medium severity because misuse could block legitimate ID allocations for team members or cause ID conflicts in collaborative development.

From the tool's definition "Reserve a specific ID for use" — reserves/allocates a specific ID, creating a persistent reservation record

Documented attack patterns abuse exactly the kind of access reserve-id gives an agent:

POLICY

How to control reserve-id

PolicyLayer is an MCP gateway — it sits between your AI agents and AL Object ID Ninja MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for reserve-id:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "reserve-id": {
      "limits": [
        {
          "counter": "reserve-id_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

reserve-id 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 AL Object ID Ninja 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

Related tools and policies

More AL Object ID Ninja MCP Server tools

Execute start-polling Start the polling service for real-time updates Execute stop-polling Stop the polling service Write authorize-app Authorize an AL app with the backend Write reserve-range Reserve a range of IDs for future use Write sync-object-ids Sync consumed object IDs with the backend Write assign-ids Interactively assign object IDs with collision checking Write batch-assign Batch assign IDs for multiple object types Write import-config Import configuration from JSON

All 26 AL Object ID Ninja MCP Server tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

Go deeper

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 →

FAQ

Questions about reserve-id

What does the reserve-id tool do? +

Reserve a specific ID for use. It is categorised as a Write tool in the AL Object ID Ninja 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 reserve-id? +

Register the AL Object ID Ninja MCP Server MCP server in PolicyLayer and add a rule for reserve-id: 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 AL Object ID Ninja MCP Server. Nothing to install.

What risk level is reserve-id? +

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

Can I rate-limit reserve-id? +

Yes. Add a rate_limit block to the reserve-id 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 reserve-id completely? +

Set action: deny in the PolicyLayer policy for reserve-id. 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 reserve-id? +

reserve-id is provided by the AL Object ID Ninja MCP Server MCP server (sshadows/al-objid-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 AL Object ID Ninja MCP Server tool call.

Start from AL Object ID Ninja 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 →