Return all 73 proven font pairings. Optionally filter by contrast type (Structure, Proportion, Era, Weight).
AI agents call list_pairings to retrieve information from Google Fonts without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Even though list_pairings only reads data, uncontrolled read access leaks sensitive information and racks up API costs — an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
Return all 73 proven font pairings. Optionally filter by contrast type (Structure, Proportion, Era, Weight). It is categorised as a Read tool in the Google Fonts MCP Server, which means it retrieves data without modifying state.
Register the Google Fonts MCP server in PolicyLayer and add a rule for list_pairings: 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 Google Fonts. Nothing to install.
list_pairings 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 list_pairings 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 list_pairings. 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.
list_pairings is provided by the Google Fonts MCP server (sliday/google-fonts-skill). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.