List super-studies (umbrella collections like Tara Oceans, Earth Microbiome Project, HoloFood).
AI agents call mgnify_list_super_studies to retrieve information from MGnify MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and lists metadata about super-studies (Tara Oceans, Earth Microbiome Project, HoloFood). It has no side effects, does not modify data, execute code, delete resources, or commit financial obligations. It is a straightforward read operation on a public scientific database.
From the tool's definition Tool name contains 'list' and description states 'List super-studies' — a retrieval operation that queries and returns information about umbrella study collections without modification.
Attacks that exploit this kind of access
List super-studies (umbrella collections like Tara Oceans, Earth Microbiome Project, HoloFood). It is categorised as a Read tool in the MGnify MCP Server MCP Server, which means it retrieves data without modifying state.
Register the MGnify MCP Server MCP server in PolicyLayer and add a rule for mgnify_list_super_studies: 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 MGnify MCP Server. Nothing to install.
mgnify_list_super_studies 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 mgnify_list_super_studies 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 mgnify_list_super_studies. 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.
mgnify_list_super_studies is provided by the MGnify MCP Server MCP server (mgs-sails/mgnify-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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