Get daily summary air quality data for all monitoring sites in a county. Daily summaries include arithmetic mean, maximum values, observation counts, and AQI values for each day. Requires state FIPS code (2-digit) and county FIPS code (3-digit).
AI agents call aqs_daily_summary_by_county 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 performs a straightforward data retrieval operation on public EPA air quality monitoring information. It has no side effects, cannot modify or delete data, and does not execute external commands or financial transactions. The blast radius of misuse is minimal—an agent could query unnecessary geographic regions consuming API quota, but cannot damage or alter data.
From the tool's definition Tool retrieves 'daily summary air quality data' including 'arithmetic mean, maximum values, observation counts, and AQI values' without modifying, deleting, or executing operations.
Attacks that exploit this kind of access
Get daily summary air quality data for all monitoring sites in a county. Daily summaries include arithmetic mean, maximum values, observation counts, and AQI values for each day. Requires state FIPS code (2-digit) and county FIPS code (3-digit). 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_daily_summary_by_county: 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_daily_summary_by_county 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_daily_summary_by_county 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_daily_summary_by_county. 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_daily_summary_by_county 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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