Returns MyChem.info build metadata: total indexed compound count, available annotation sources (ChEMBL, DrugBank, PubChem, ChEBI, DrugCentral, FDA NDC), and their current release versions.
AI agents call metadata to retrieve information from Mcp Mychem without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves metadata and statistics about the MyChem.info database. It has no side effects, does not modify any data, and cannot be misused to cause harm beyond information disclosure of publicly available database metadata.
From the tool's definition Returns MyChem.info build metadata: total indexed compound count, available annotation sources... and their current release versions.
Attacks that exploit this kind of access
Returns MyChem.info build metadata: total indexed compound count, available annotation sources (ChEMBL, DrugBank, PubChem, ChEBI, DrugCentral, FDA NDC), and their current release versions. It is categorised as a Read tool in the Mcp Mychem MCP Server, which means it retrieves data without modifying state.
Register the Mcp Mychem MCP server in PolicyLayer and add a rule for metadata: 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 Mcp Mychem. Nothing to install.
metadata 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 metadata 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 metadata. 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.
metadata is provided by the Mcp Mychem MCP server (pipeworx-io/mcp-mychem). 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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