AI agents call get_ga4gh_variants 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 genomic variant information from the GA4GH (Global Alliance for Genomics and Health) standard by a specific identifier. No mutation, creation, deletion, or execution of code is indicated. It is a straightforward data query operation with no irreversible effects, fitting the 'Read' category at low severity.
From the tool's definition Tool name 'get_ga4gh_variants' and description 'Get GA4GH variant by ID' indicate a retrieval operation. The verb 'Get' and the pattern of querying by ID (consistent with sibling tools like 'clinvar_find_single_mutation' and 'depmap_get_dependency') clearly…
Documented attack patterns abuse exactly the kind of access get_ga4gh_variants 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_ga4gh_variants:
{
"version": "1",
"default": "deny",
"tools": {
"get_ga4gh_variants": {}
}
}get_ga4gh_variants is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get GA4GH variant by ID. 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_ga4gh_variants: 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_ga4gh_variants 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_ga4gh_variants 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_ga4gh_variants. 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_ga4gh_variants 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.
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