Get raw sample data for all monitoring sites in a Core Based Statistical Area (CBSA).
AI agents call aqs_sample_data_by_cbsa to retrieve information from EPA Air Quality System (AQS) 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 air quality monitoring data from the EPA's AQS API for a geographic region (CBSA). It performs a query operation that returns existing data without side effects, altering data, executing code, deleting records, or moving funds. The action is read-only and informational, presenting minimal security risk if misused by an AI agent.
From the tool's definition Tool name includes 'get' action (implicit in 'aqs_sample_data_by_cbsa'), description states 'Get raw sample data' and 'monitoring sites' — pure data retrieval with no modification, deletion, or execution capabilities.
Attacks that exploit this kind of access
Get raw sample data for all monitoring sites in a Core Based Statistical Area (CBSA). It is categorised as a Read tool in the EPA Air Quality System (AQS) MCP Server MCP Server, which means it retrieves data without modifying state.
Register the EPA Air Quality System (AQS) MCP Server MCP server in PolicyLayer and add a rule for aqs_sample_data_by_cbsa: 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 EPA Air Quality System (AQS) MCP Server. Nothing to install.
aqs_sample_data_by_cbsa 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 aqs_sample_data_by_cbsa 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 aqs_sample_data_by_cbsa. 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.
aqs_sample_data_by_cbsa is provided by the EPA Air Quality System (AQS) MCP Server MCP server (tyson-swetnam/aqs-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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