List national holidays for a given year
AI agents call get_holidays to retrieve information from Mcp Afip without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple data retrieval operation—querying a list of national holidays. It does not modify, execute code, delete data, or involve financial transactions. The blast radius of misuse is negligible, as an AI agent retrieving holiday information poses no security or operational risk.
From the tool's definition Tool name 'get_holidays' and description 'List national holidays for a given year' indicate a read-only operation that retrieves holiday data without modification or side effects.
Documented attack patterns abuse exactly the kind of access get_holidays gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Afip, and nothing reaches the server without passing your rules. This is the rule we recommend for get_holidays:
{
"version": "1",
"default": "deny",
"tools": {
"get_holidays": {}
}
} get_holidays is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List national holidays for a given year. It is categorised as a Read tool in the Mcp Afip MCP Server, which means it retrieves data without modifying state.
Register the Mcp Afip MCP server in PolicyLayer and add a rule for get_holidays: 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 Mcp Afip. Nothing to install.
get_holidays 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_holidays 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_holidays. 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_holidays is provided by the Mcp Afip MCP server (codespar/mcp-dev-latam). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mcp Afip, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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