Search GEO Samples (GSM) - individual samples
AI agents call search_geo_samples to retrieve information from Geo without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a search/query operation on public scientific data without side effects, modifying data, executing code, or creating financial obligations. Search operations are inherently read-only and fall under the 'Read' category. The public nature of GEO data and absence of any write, execute, or destructive capabilities warrant low severity classification.
From the tool's definition Tool searches GEO Samples (GSM) and retrieves individual sample data from the publicly available Gene Expression Omnibus database. The operation is read-only with no modification or deletion capabilities mentioned.
Documented attack patterns abuse exactly the kind of access search_geo_samples gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Geo, and nothing reaches the server without passing your rules. This is the rule we recommend for search_geo_samples:
{
"version": "1",
"default": "deny",
"tools": {
"search_geo_samples": {}
}
}search_geo_samples is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Search GEO Samples (GSM) - individual samples. It is categorised as a Read tool in the Geo MCP Server, which means it retrieves data without modifying state.
Register the Geo MCP server in PolicyLayer and add a rule for search_geo_samples: 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 Geo. Nothing to install.
search_geo_samples 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 search_geo_samples 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 search_geo_samples. 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.
search_geo_samples is provided by the Geo MCP server (mcpmed/geomcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Geo, 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.
11 Geo tools catalogued and risk-classified — across an index of 43,000+ MCP servers.