AI agents call geocode_legacy_lookup to retrieve information from Attom without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves geocoding data without any capability to modify, delete, or execute operations. It is a straightforward query operation that returns existing geographic information, posing minimal security risk if misused by an AI agent. The worst-case scenario would be accessing publicly available or already-authorized geocoding data.
From the tool's definition Tool description states 'Get legacy geocode lookup information' - a retrieval operation with no modification, deletion, or code execution. The verb 'Get' and context of 'lookup information' indicate read-only data retrieval.
Attacks that exploit this kind of access
Get legacy geocode lookup information. It is categorised as a Read tool in the Attom MCP Server, which means it retrieves data without modifying state.
Register the Attom MCP server in PolicyLayer and add a rule for geocode_legacy_lookup: 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 Attom. Nothing to install.
geocode_legacy_lookup 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 geocode_legacy_lookup 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 geocode_legacy_lookup. 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.
geocode_legacy_lookup is provided by the Attom MCP server (nkbud/mcp-server-attom). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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