AI agents call post_ga4gh_beacon_query 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.
GA4GH Beacon is a standard protocol for querying genomic variant availability across databases. Despite using POST, the operation is a read/search that retrieves information about genomic variants. No data is created, modified, or deleted. Severity is low as it only retrieves publicly discoverable genomic data.
From the tool's definition 'Query Beacon with POST' — the tool queries a GA4GH Beacon endpoint (a genomic data discovery API) using HTTP POST; POST is used here as a query mechanism, not for data creation
Documented attack patterns abuse exactly the kind of access post_ga4gh_beacon_query 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 post_ga4gh_beacon_query:
{
"version": "1",
"default": "deny",
"tools": {
"post_ga4gh_beacon_query": {}
}
}post_ga4gh_beacon_query is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Query Beacon with POST. 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 post_ga4gh_beacon_query: 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.
post_ga4gh_beacon_query 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 post_ga4gh_beacon_query 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 post_ga4gh_beacon_query. 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.
post_ga4gh_beacon_query 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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439 OrigeneMCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.