Retrieve quarterly summary data for all air quality monitoring sites in a state.
AI agents call aqs_quarterly_summary_by_state 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 queries and returns air quality summary data without creating, modifying, deleting, or executing any operations. It follows the pattern of sibling tools (aqs_annual_summary_*, aqs_daily_summary_*) which are all retrieval-based. There is no blast radius from misuse—an AI agent querying air quality data poses minimal risk. The severity is low as it only accesses public environmental monitoring information.
From the tool's definition Tool name 'aqs_quarterly_summary_by_state' and description 'Retrieve quarterly summary data' indicate data retrieval with no modification capability.
Attacks that exploit this kind of access
Retrieve quarterly summary data for all air quality monitoring sites in a state. 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_quarterly_summary_by_state: 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_quarterly_summary_by_state 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_quarterly_summary_by_state 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_quarterly_summary_by_state. 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_quarterly_summary_by_state 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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