Retrieve a list of shared tier regions
AI agents call list_sharedtier_regions to retrieve information from SingleStore MCP Server 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 information about available shared tier regions in SingleStore. It performs a simple data query with no capability to modify, delete, or execute operations. The blast radius of misuse is minimal—an attacker could only learn what regions are available, which is typically non-sensitive infrastructure metadata.
From the tool's definition Tool name 'list_sharedtier_regions' and description 'Retrieve a list of shared tier regions' indicate a read-only query operation with no side effects.
Documented attack patterns abuse exactly the kind of access list_sharedtier_regions gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and SingleStore MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_sharedtier_regions:
{
"version": "1",
"default": "deny",
"tools": {
"list_sharedtier_regions": {}
}
}list_sharedtier_regions is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Retrieve a list of shared tier regions. It is categorised as a Read tool in the SingleStore MCP Server MCP Server, which means it retrieves data without modifying state.
Register the SingleStore MCP Server MCP server in PolicyLayer and add a rule for list_sharedtier_regions: 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 SingleStore MCP Server. Nothing to install.
list_sharedtier_regions 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 list_sharedtier_regions 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 list_sharedtier_regions. 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.
list_sharedtier_regions is provided by the SingleStore MCP Server MCP server (singlestore-labs/mcp-server-singlestore). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 24 SingleStore MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
24 SingleStore MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.