Reconstruct the entire ancestry of a term from is_a and part_of relationships.
AI agents call get_ontology_ancestors_chart 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 performs data retrieval by reconstructing hierarchical relationships within an ontology—a read-only operation with no side effects, no code execution, and no data modification. It queries existing relationships (is_a and part_of) to build a chart of ancestors. This is a classic Read category operation used for information gathering in biomedical research contexts.
From the tool's definition Tool name 'get_ontology_ancestors_chart' and description 'Reconstruct the entire ancestry of a term from is_a and part_of relationships' indicate a query operation that retrieves and traverses ontological data structures without modifying them.
Risk signalsBulk/mass operation — affects multiple targets
Documented attack patterns abuse exactly the kind of access get_ontology_ancestors_chart 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_ontology_ancestors_chart:
{
"version": "1",
"default": "deny",
"tools": {
"get_ontology_ancestors_chart": {}
}
}get_ontology_ancestors_chart is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Reconstruct the entire ancestry of a term from is_a and part_of relationships. 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_ontology_ancestors_chart: 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_ontology_ancestors_chart 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_ontology_ancestors_chart 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_ontology_ancestors_chart. 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_ontology_ancestors_chart 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.
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