Duplicate selected objects / 選択したオブジェクトを複製
AI agents use affinity_duplicate_selection to create or update resources in MCP Affinity Designer Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP Affinity Designer Server environment.
Duplication is a reversible write operation that creates new content but does not destroy or permanently modify existing data. The blast radius is medium because uncontrolled duplication could bloat documents or create unwanted artifacts, but the action can be undone. It does not execute arbitrary code, trigger external systems, or cause financial impact.
From the tool's definition Tool name is 'affinity_duplicate_selection' and description states 'Duplicate selected objects' — this creates new copies of existing design elements within the document.
Documented attack patterns abuse exactly the kind of access affinity_duplicate_selection gives an agent:
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_duplicate_selection:
{
"version": "1",
"default": "deny",
"tools": {
"affinity_duplicate_selection": {
"limits": [
{
"counter": "affinity_duplicate_selection_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}affinity_duplicate_selection 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.
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Duplicate selected objects / 選択したオブジェクトを複製. 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.
Register the MCP Affinity Designer Server MCP server in PolicyLayer and add a rule for affinity_duplicate_selection: 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.
affinity_duplicate_selection is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the affinity_duplicate_selection 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.
Set action: deny in the PolicyLayer policy for affinity_duplicate_selection. 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.
affinity_duplicate_selection 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.
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.
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28 MCP Affinity Designer Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.