AI agents call GetAHOReferenceStore to retrieve information from Amazon Redshift MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'Get' prefix and 'ReferenceStore' noun strongly suggest querying or retrieving reference data from AWS/Redshift systems. This is a read operation with no apparent side effects. Severity is medium because misconfigured access could expose sensitive reference data used in genomic sequencing (AHO = AWS HealthOmics), but the tool itself performs no destructive, financial, or arbitrary execution—just retrieval.
From the tool's definition The tool name 'GetAHOReferenceStore' indicates data retrieval ('Get') from a reference store. Combined with the Amazon Redshift MCP Server context and sibling tools like 'ActivateAHOReadSets' that suggest read/analysis operations, this is a retrieval…
Documented attack patterns abuse exactly the kind of access GetAHOReferenceStore gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Amazon Redshift MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for GetAHOReferenceStore:
{
"version": "1",
"default": "deny",
"tools": {
"GetAHOReferenceStore": {}
}
} GetAHOReferenceStore is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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GetAHOReferenceStore. It is categorised as a Read tool in the Amazon Redshift MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Amazon Redshift MCP Server MCP server in PolicyLayer and add a rule for GetAHOReferenceStore: 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 Amazon Redshift MCP Server. Nothing to install.
GetAHOReferenceStore 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 GetAHOReferenceStore 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 GetAHOReferenceStore. 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.
GetAHOReferenceStore is provided by the Amazon Redshift MCP Server MCP server (awslabs.redshift-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Amazon Redshift MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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