Emulate prefers-color-scheme (light/dark mode) in the current page.
Part of the Safari DevTools MCP server.
Free to start. No card required.
AI agents use set_color_scheme to create or modify resources in Safari DevTools MCP. 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 set_color_scheme 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 Safari DevTools MCP.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"set_color_scheme": {
"limits": [
{
"counter": "set_color_scheme_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Safari DevTools MCP policy for all 53 tools.
These attack patterns abuse exactly the kind of access set_color_scheme 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.
Emulate prefers-color-scheme (light/dark mode) in the current page.. It is categorised as a Write tool in the Safari DevTools MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Safari DevTools MCP server in PolicyLayer and add a rule for set_color_scheme: 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 Safari DevTools MCP. Nothing to install.
set_color_scheme 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 set_color_scheme 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 set_color_scheme. 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.
set_color_scheme is provided by the Safari DevTools MCP server (safari-devtools-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 53 Safari DevTools MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.