AI agents call lookup_ich_guideline to retrieve information from Regsub without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries a regulatory knowledge base to retrieve and display information about ICH guidelines. It has no side effects, does not modify any data, and does not execute external operations or commands. It is a straightforward informational lookup, making it a Read category tool with low severity since misuse would only result in access to documentation that is already public.
From the tool's definition Tool 'lookup_ich_guideline' returns scope, key requirements, and official URL for ICH guidelines—a pure retrieval operation with no modification, deletion, or external execution.
Attacks that exploit this kind of access
Look up an ICH guideline by code (e.g. E6(R3), M4, Q1A). Returns scope, key requirements, and official URL. It is categorised as a Read tool in the Regsub MCP Server, which means it retrieves data without modifying state.
Register the Regsub MCP server in PolicyLayer and add a rule for lookup_ich_guideline: 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 Regsub. Nothing to install.
lookup_ich_guideline 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 lookup_ich_guideline 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 lookup_ich_guideline. 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.
lookup_ich_guideline is provided by the Regsub MCP server (pubspro/regsub-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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