AI agents use figma_rename_variable_collection to create or update resources in Figma MCP Bridge — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Figma MCP Bridge environment.
This tool creates or modifies data (renames a collection) in a reversible manner. It does not execute arbitrary code, delete data permanently, or move financial assets. The blast radius is medium because renaming a variable collection could break dependent components or cause confusion in a design system, but the action is reversible by renaming it back.
From the tool's definition Tool is named 'figma_rename_variable_collection' and description states it renames a variable collection. Renaming modifies data reversibly without deleting it.
Documented attack patterns abuse exactly the kind of access figma_rename_variable_collection gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Figma MCP Bridge, and nothing reaches the server without passing your rules. This is the rule we recommend for figma_rename_variable_collection:
{
"version": "1",
"default": "deny",
"tools": {
"figma_rename_variable_collection": {
"limits": [
{
"counter": "figma_rename_variable_collection_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
} figma_rename_variable_collection 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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Rename a variable collection. It is categorised as a Write tool in the Figma MCP Bridge MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Figma MCP Bridge MCP server in PolicyLayer and add a rule for figma_rename_variable_collection: 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 Figma MCP Bridge. Nothing to install.
figma_rename_variable_collection 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 figma_rename_variable_collection 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 figma_rename_variable_collection. 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.
figma_rename_variable_collection is provided by the Figma MCP Bridge MCP server (magic-spells/figma-mcp-bridge). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Figma MCP Bridge, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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88 Figma MCP Bridge tools catalogued and risk-classified — across an index of 43,000+ MCP servers.