AI agents call get_toll_site to retrieve information from Plurity without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves information about a Toll site and returns an installation key. While it is fundamentally a Read operation (queries data without side effects), the severity is elevated to medium because the installation key returned could be sensitive authentication material that, if exposed to an unauthorized agent, might facilitate unauthorized site configuration or management.
From the tool's definition The tool description states it 'Get[s] full details for a Toll site, including the installation key.' This is a retrieval operation that does not modify data.
Attacks that exploit this kind of access
Get full details for a Toll site, including the installation key. It is categorised as a Read tool in the Plurity MCP Server, which means it retrieves data without modifying state.
Register the Plurity MCP server in PolicyLayer and add a rule for get_toll_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 Plurity. Nothing to install.
get_toll_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 get_toll_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 get_toll_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.
get_toll_site is provided by the Plurity MCP server (plurity-ai/plurity-mcp). 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.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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