AI agents call get_clinvar_variant to retrieve information from Gwas without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries a public biomedical database (ClinVar) to retrieve variant information. The verb 'Get' and the context of 'detailed information' demonstrate a read-only operation that retrieves data without creating, modifying, deleting, or executing external operations. The tool accepts identifiers (rsID or ClinVar ID) as arguments and returns clinical variant data, consistent with pure data retrieval.
From the tool's definition Tool name 'get_clinvar_variant' and description 'Get detailed ClinVar information for a specific variant by rsID or ClinVar ID' indicate retrieval of existing data with no modification or side effects.
Attacks that exploit this kind of access
Get detailed ClinVar information for a specific variant by rsID or ClinVar ID. It is categorised as a Read tool in the Gwas MCP Server, which means it retrieves data without modifying state.
Register the Gwas MCP server in PolicyLayer and add a rule for get_clinvar_variant: 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 Gwas. Nothing to install.
get_clinvar_variant 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_clinvar_variant 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_clinvar_variant. 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_clinvar_variant is provided by the Gwas MCP server (muslus/gwas-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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