Get summary of nodes with statistics and grouping to reduce token usage
AI agents call getNodesSummary to retrieve information from Sketch without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves statistical summaries and grouping information from design nodes in a Sketch file. It performs data aggregation for display/analysis purposes with no side effects, no data modification, no code execution, and no destructive operations. It is optimized for token efficiency but remains fundamentally a read operation.
From the tool's definition Tool name 'getNodesSummary' and description 'Get summary of nodes with statistics and grouping to reduce token usage' indicate a read-only operation that retrieves and aggregates data from Sketch design files without modifying, deleting, or executing…
Documented attack patterns abuse exactly the kind of access getNodesSummary gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Sketch, and nothing reaches the server without passing your rules. This is the rule we recommend for getNodesSummary:
{
"version": "1",
"default": "deny",
"tools": {
"getNodesSummary": {}
}
}getNodesSummary is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get summary of nodes with statistics and grouping to reduce token usage. It is categorised as a Read tool in the Sketch MCP Server, which means it retrieves data without modifying state.
Register the Sketch MCP server in PolicyLayer and add a rule for getNodesSummary: 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 Sketch. Nothing to install.
getNodesSummary is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the getNodesSummary 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 getNodesSummary. 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.
getNodesSummary is provided by the Sketch MCP server (mater1996/sketch-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Sketch, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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17 Sketch tools catalogued and risk-classified — across an index of 43,000+ MCP servers.