Create a new local variable collection with an optional initial mode name. NOTE — Figma free plan limits each collection to 1 mode. If you need Light/Dark (or any multi-mode) theming and the user is on the free plan, do NOT try to call add_variable_mode; instead use the name-prefix workaround: cr...
Part of the Figma Mcp Go server.
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AI agents use create_variable_collection to create or modify resources in Figma Mcp Go. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call create_variable_collection repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Figma Mcp Go.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"create_variable_collection": {
"limits": [
{
"counter": "create_variable_collection_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Figma Mcp Go policy for all 73 tools.
These attack patterns abuse exactly the kind of access create_variable_collection gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Create a new local variable collection with an optional initial mode name. NOTE — Figma free plan limits each collection to 1 mode. If you need Light/Dark (or any multi-mode) theming and the user is on the free plan, do NOT try to call add_variable_mode; instead use the name-prefix workaround: create all variables in a single collection and prefix each variable name with its mode, e.g. 'light/color-bg' and 'dark/color-bg'. Inform the user of this limitation.. It is categorised as a Write tool in the Figma Mcp Go MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Figma Mcp Go MCP server in PolicyLayer and add a rule for create_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 Go. Nothing to install.
create_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 create_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 create_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.
create_variable_collection is provided by the Figma Mcp Go MCP server (@vkhanhqui/figma-mcp-go). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 73 Figma Mcp Go tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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