affinity_new_document

THE RISK

Medium Risk

Why affinity_new_document needs a policy

This tool creates a new document, which is a reversible write operation. It does not delete or overwrite existing data, execute arbitrary code, or have financial implications. A new document can simply be closed/discarded, making it low severity.

From the tool's definition "Create new document in Affinity Designer"

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

POLICY

How to control affinity_new_document

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

policy.json

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

affinity_new_document 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 MCP Affinity Designer 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 MCP Affinity Designer Server tools

Destructive affinity_delete_layer Delete selected layer / 選択したレイヤーを削除 Execute affinity_execute_command Execute Affinity Designer automation command / Affinity Designer自動化コマンドを実行 Execute affinity_start_app Start Affinity Designer application / Affinity Designerアプリケーションを開始 Execute affinity_focus_window Focus the Affinity Designer window / Affinity Designerウィンドウにフォーカス Execute affinity_select_tool Select a specific tool in Affinity Designer / Affinity Designerで特定のツールを選択 Execute affinity_send_shortcut Send keyboard shortcut to Affinity Designer / Affinity Designerにキーボードショートカットを送信 Write affinity_toggle_layer_visibility Toggle layer visibility (show/hide) / レイヤーの表示/非表示を切り替え Write affinity_add_text Add text to the document / ドキュメントにテキストを追加

All 28 MCP Affinity Designer Server tools →

Write tools on other servers

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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 affinity_new_document

What does the affinity_new_document tool do? +

Create new document in Affinity Designer / Affinity Designerで新しいドキュメントを作成. It is categorised as a Write tool in the MCP Affinity Designer 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 affinity_new_document? +

Register the MCP Affinity Designer Server MCP server in PolicyLayer and add a rule for affinity_new_document: 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 MCP Affinity Designer Server. Nothing to install.

What risk level is affinity_new_document? +

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

Can I rate-limit affinity_new_document? +

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

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

affinity_new_document is provided by the MCP Affinity Designer Server MCP server (szgk/mcp-affinity-designer). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Affinity Designer Server tool call.

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

CHECK YOUR STACK →