Generate a complete design token system from a brand hex color. Returns OKLCH-derived colors (light + dark mode), typography pairing, spacing scale, border radius, shadows, WCAG contrast validation, APCA scoring, design intent brief, and a visual preview URL on tokven.dev. Output in CSS, Tailwind...
Part of the Tokven server.
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AI agents use generate_tokens to create or modify resources in Tokven. 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 generate_tokens 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 Tokven.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"generate_tokens": {
"limits": [
{
"counter": "generate_tokens_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Tokven policy for all 5 tools.
These attack patterns abuse exactly the kind of access generate_tokens 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.
Generate a complete design token system from a brand hex color. Returns OKLCH-derived colors (light + dark mode), typography pairing, spacing scale, border radius, shadows, WCAG contrast validation, APCA scoring, design intent brief, and a visual preview URL on tokven.dev. Output in CSS, Tailwind v4, Tailwind v3, or DTCG JSON. Tip: call get_token_preview first to let the user approve the palette visually.. It is categorised as a Write tool in the Tokven MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Tokven MCP server in PolicyLayer and add a rule for generate_tokens: 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 Tokven. Nothing to install.
generate_tokens 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 generate_tokens 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 generate_tokens. 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.
generate_tokens is provided by the Tokven MCP server (tokven-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 5 Tokven tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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