Fetch official MDN documentation for any CSS property, selector, function, or concept. Use this tool PROACTIVELY whenever the user mentions CSS features. Supports simple slugs (auto-normalized):
AI agents call get_docs to retrieve information from CSS MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves CSS documentation from MDN, which is a read-only lookup operation. It queries existing public documentation without creating, modifying, executing code, deleting data, or moving money. The auto-normalization feature mentioned is preprocessing for the query, not a side effect. No destructive or risky operations are possible with this tool.
From the tool's definition Tool description states 'Fetch official MDN documentation' - a retrieval operation with no modification, execution, or side effects. The phrasing 'Fetch' and 'documentation' explicitly indicates query/read semantics.
Documented attack patterns abuse exactly the kind of access get_docs gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and CSS MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_docs:
{
"version": "1",
"default": "deny",
"tools": {
"get_docs": {}
}
}get_docs is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Fetch official MDN documentation for any CSS property, selector, function, or concept. Use this tool PROACTIVELY whenever the user mentions CSS features. Supports simple slugs (auto-normalized):. It is categorised as a Read tool in the CSS MCP Server MCP Server, which means it retrieves data without modifying state.
Register the CSS MCP Server MCP server in PolicyLayer and add a rule for get_docs: 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 CSS MCP Server. Nothing to install.
get_docs is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_docs 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 get_docs. 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.
get_docs is provided by the CSS MCP Server MCP server (stolinski/css-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 4 CSS MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4 CSS MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.