Get state and cities for a DDD (area code)
AI agents call get_ddd to retrieve information from Mcp Ap2 without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves reference data about geographical divisions associated with area codes. It has no side effects, does not modify data, and does not execute code or trigger financial transactions. It is purely informational lookup functionality, consistent with the Read category.
From the tool's definition Tool name 'get_ddd' and description 'Get state and cities for a DDD (area code)' indicate a retrieval operation that queries geographical data (states and cities associated with a DDD/area code) without modifying, deleting, or executing external operations.
Documented attack patterns abuse exactly the kind of access get_ddd gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Ap2, and nothing reaches the server without passing your rules. This is the rule we recommend for get_ddd:
{
"version": "1",
"default": "deny",
"tools": {
"get_ddd": {}
}
} get_ddd is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get state and cities for a DDD (area code). It is categorised as a Read tool in the Mcp Ap2 MCP Server, which means it retrieves data without modifying state.
Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for get_ddd: 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 Ap2. Nothing to install.
get_ddd 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_ddd 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_ddd. 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_ddd is provided by the Mcp Ap2 MCP server (@codespar/mcp-ap2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Mcp Ap2, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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