Discover SCP endpoint for a merchant domain via DNS
AI agents call scp_discover to retrieve information from SCP Local 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 DNS records to discover merchant endpoints, which is a read-only operation with no side effects. While it interacts with external DNS infrastructure, it simply retrieves already-published information. The blast radius is minimal—incorrect discovery might result in connecting to wrong endpoints (caught by subsequent OAuth authorization checks), but cannot directly compromise data or execute actions.
From the tool's definition 'Discover SCP endpoint for a merchant domain via DNS' - performs DNS lookup to retrieve endpoint information, no modification or execution of external operations.
Attacks that exploit this kind of access
Discover SCP endpoint for a merchant domain via DNS. It is categorised as a Read tool in the SCP Local MCP Server MCP Server, which means it retrieves data without modifying state.
Register the SCP Local MCP Server MCP server in PolicyLayer and add a rule for scp_discover: 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 SCP Local MCP Server. Nothing to install.
scp_discover 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 scp_discover 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 scp_discover. 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.
scp_discover is provided by the SCP Local MCP Server MCP server (shopper-context-protocol/scp-mcp-wrapper). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
scp_discover is one line of SCP Local MCP Server'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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