List samples that belong to a study.
AI agents call mgnify_study_samples 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 queries and returns metagenomic sample data associated with a study. It performs a data retrieval operation analogous to a GET request or database SELECT query. There is no indication of modification, deletion, execution of arbitrary code, or financial impact. The blast radius of misuse is minimal—an agent could only retrieve study sample metadata that may already be accessible through the MGnify API.
From the tool's definition Tool name 'mgnify_study_samples' and description 'List samples that belong to a study' indicate a query/retrieval operation with no side effects. The verb 'List' is explicitly a read operation that retrieves existing data without modification.
Attacks that exploit this kind of access
List samples that belong to a study. 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_study_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 MGnify MCP Server. Nothing to install.
mgnify_study_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 mgnify_study_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 mgnify_study_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.
mgnify_study_samples 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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