AI agents call get_traffic_by_canton to retrieve information from Mcp Swiss without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists publicly available traffic data from Swiss traffic counting stations. It performs a read-only query operation with no side effects, no code execution, no data modification, and no financial implications. The action is purely informational, returning traffic statistics for a specified canton. Low severity because misuse would only result in excessive data retrieval, not actual harm.
From the tool's definition Tool name 'get_traffic_by_canton' and description 'List ASTRA traffic counting stations in a Swiss canton. Returns up to 20 stations with traffic data' indicate a retrieval/query operation with no modification or execution capabilities.
Attacks that exploit this kind of access
List ASTRA traffic counting stations in a Swiss canton. Returns up to 20 stations with traffic data. It is categorised as a Read tool in the Mcp Swiss MCP Server, which means it retrieves data without modifying state.
Register the Mcp Swiss MCP server in PolicyLayer and add a rule for get_traffic_by_canton: 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 Mcp Swiss. Nothing to install.
get_traffic_by_canton 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 get_traffic_by_canton 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 get_traffic_by_canton. 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.
get_traffic_by_canton is provided by the Mcp Swiss MCP server (mcp-swiss). 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.
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