Find compounds tested against a specific biological target
AI agents call search_by_target to retrieve information from PubChem MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a search/lookup operation against PubChem's chemical database to retrieve information about compounds matching specified biological targets. It returns pre-existing data without side effects, state changes, or irreversible actions. The operation is read-only and has minimal blast radius if called with unexpected arguments—worst case would be retrieval of unintended but already-public chemical data.
From the tool's definition Tool name 'search_by_target' and description 'Find compounds tested against a specific biological target' indicate a query operation that retrieves data about compounds and their bioactivity relationships.
Attacks that exploit this kind of access
Find compounds tested against a specific biological target. It is categorised as a Read tool in the PubChem MCP Server MCP Server, which means it retrieves data without modifying state.
Register the PubChem MCP Server MCP server in PolicyLayer and add a rule for search_by_target: 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 PubChem MCP Server. Nothing to install.
search_by_target 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_by_target 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_by_target. 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_by_target is provided by the PubChem MCP Server MCP server (k-lordbodin7/pubchem-mcp-server). 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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