AI agents call search_omim 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 retrieves and queries data from OMIM, a public reference database of human genetic disorders. The 'search' operation is read-only with no side effects—it does not create, modify, delete, or execute anything. The blast radius of misuse is minimal, as an AI agent could only retrieve information already publicly available in OMIM.
From the tool's definition Tool name 'search_omim' and description 'Search OMIM...for genetic diseases and phenotypes' indicate a query/retrieval operation against a public biological database with no modification, deletion, or execution capabilities.
Attacks that exploit this kind of access
Search OMIM (Online Mendelian Inheritance in Man) for genetic diseases and phenotypes. 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 search_omim: 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.
search_omim 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_omim 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_omim. 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_omim 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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