从Figma DSL文件中提取颜色变量，并输出在用户指定的文件中（比如unocss、tailwindcss或者自定义标准文件中等）
AI agents use extract-color-vars to create or update resources in Feuse — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Feuse environment.
The tool reads color variables from a Figma DSL file and writes the results to a user-specified output file (e.g., unocss, tailwindcss, or custom standard files). The primary action is writing/creating a file with extracted color variables, which is a reversible write operation.
From the tool's definition 提取颜色变量，并输出在用户指定的文件中 (extracts color variables and outputs them to a user-specified file)
Documented attack patterns abuse exactly the kind of access extract-color-vars gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Feuse, and nothing reaches the server without passing your rules. This is the rule we recommend for extract-color-vars:
{
"version": "1",
"default": "deny",
"tools": {
"extract-color-vars": {
"limits": [
{
"counter": "extract-color-vars_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}extract-color-vars 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.
Free to start. No card required.
从Figma DSL文件中提取颜色变量，并输出在用户指定的文件中（比如unocss、tailwindcss或者自定义标准文件中等）. It is categorised as a Write tool in the Feuse MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Feuse MCP server in PolicyLayer and add a rule for extract-color-vars: 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 Feuse. Nothing to install.
extract-color-vars 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 extract-color-vars 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 extract-color-vars. 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.
extract-color-vars is provided by the Feuse MCP server (panzer-jack/feuse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 8 Feuse tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
8 Feuse tools catalogued and risk-classified — across an index of 42,500+ MCP servers.