AI agents call sst_discover to retrieve information from MCP-SST 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 running dev servers and available deployment stages. It performs a query/discovery operation with no side effects, state changes, or operational impact. The worst-case misuse would be reconnaissance to understand the environment, which is relatively low-risk compared to write, execute, or destructive operations.
From the tool's definition Tool name 'sst_discover' and description 'Discover running SST dev servers and available stages' indicate passive discovery/enumeration of existing resources with no modification, execution, or deletion of data.
Attacks that exploit this kind of access
Discover running SST dev servers and available stages. It is categorised as a Read tool in the MCP-SST MCP Server, which means it retrieves data without modifying state.
Register the MCP-SST MCP server in PolicyLayer and add a rule for sst_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 MCP-SST. Nothing to install.
sst_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 sst_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 sst_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.
sst_discover is provided by the MCP-SST MCP server (shanewwarren/mcp-sst). 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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