AI agents call get_field_size_stats to retrieve information from OrigeneMCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and reports statistics (counts, sizes) of array/list fields from the biomedical databases. It has no side effects—it only reads and aggregates existing data. No write, execute, destructive, or financial operations are involved. The minimal blast radius (read-only informational access) justifies 'low' severity and high confidence.
From the tool's definition Tool name 'get_field_size_stats' and description 'Get size statistics for list/array fields' indicate a query/retrieval operation that returns statistical metadata about data structure sizes without modifying, executing code, deleting, or moving money.
Documented attack patterns abuse exactly the kind of access get_field_size_stats gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and OrigeneMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for get_field_size_stats:
{
"version": "1",
"default": "deny",
"tools": {
"get_field_size_stats": {}
}
}get_field_size_stats is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get size statistics for list/array fields. It is categorised as a Read tool in the OrigeneMCP MCP Server, which means it retrieves data without modifying state.
Register the Origene MCP server in PolicyLayer and add a rule for get_field_size_stats: 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 OrigeneMCP. Nothing to install.
get_field_size_stats 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_field_size_stats 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_field_size_stats. 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_field_size_stats is provided by the Origene MCP server (gentel-lab/origenemcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from OrigeneMCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
439 OrigeneMCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.