Get daily summary air quality data for a specific monitoring site. Daily summaries include arithmetic mean, maximum values, observation counts, and AQI values for each day. Requires state FIPS code (2-digit), county FIPS code (3-digit), and site number (4-digit).
AI agents call aqs_daily_summary_by_site 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 and queries publicly available EPA air quality monitoring data with no side effects. It returns summarized air quality metrics (arithmetic mean, maximum values, observation counts, AQI values) for a specified monitoring site and date range. This is a pure read operation on a public data API with no capability to modify, delete, or execute arbitrary operations.
From the tool's definition Tool description explicitly states it 'Get[s] daily summary air quality data' and lists query parameters (state FIPS code, county FIPS code, site number). No modification, deletion, or execution capability is described.
Attacks that exploit this kind of access
Get daily summary air quality data for a specific monitoring site. Daily summaries include arithmetic mean, maximum values, observation counts, and AQI values for each day. Requires state FIPS code (2-digit), county FIPS code (3-digit), and site number (4-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_site: 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_site 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_site 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_site. 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_site 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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