AI agents call search_pdb_structures 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 a public biological database without creating, modifying, or deleting data. It has no side effects beyond returning matching protein structure information. There is no code execution, destructive capability, or financial impact. The blast radius of misuse is minimal—an agent could only spam queries or retrieve publicly available information, presenting low risk.
From the tool's definition Tool performs search functionality on PDB (Protein Data Bank) structures by protein name, gene name, or UniProt ID. The verb 'search' and the retrieval nature of querying a public biological database indicate read-only access with no modification capabilities.
Attacks that exploit this kind of access
Search PDB for protein 3D structures by protein name, gene name, or UniProt 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 search_pdb_structures: 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_pdb_structures 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_pdb_structures 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_pdb_structures. 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_pdb_structures 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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