Search for biological assays by target, description, or source
AI agents call search_bioassays 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.
The tool retrieves assay information from PubChem's database without creating, modifying, deleting, or executing any operations. It is a read-only search operation that returns existing data. The blast radius of misuse is minimal—an agent could perform excessive queries or retrieve sensitive bioassay metadata, but cannot alter data or trigger external actions.
From the tool's definition Tool name 'search_bioassays' and description 'Search for biological assays by target, description, or source' indicate a query/search operation with no data modification or execution of external operations.
Attacks that exploit this kind of access
Search for biological assays by target, description, or source. 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_bioassays: 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_bioassays 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_bioassays 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_bioassays. 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_bioassays 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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