AI agents call track_parcel 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 generates a URL for viewing parcel tracking data from Swiss Post. It has no side effects, does not modify any data, and merely facilitates access to existing tracking information. The action is purely informational (Read category).
From the tool's definition Tool returns a tracking URL; does not modify, delete, or execute operations. Description states it 'returns the official tracking page URL' — a retrieval of tracking information only.
Attacks that exploit this kind of access
Generate a Swiss Post parcel tracking URL for a given tracking number. Swiss Post does not provide a public tracking API, so this returns the official tracking page URL to open in a browser. 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 track_parcel: 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.
track_parcel 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 track_parcel 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 track_parcel. 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.
track_parcel 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.
track_parcel is one line of Mcp Swiss's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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