[CUSTOM] Calls the Marketo REST API directly (not Adobe's native MCP).
AI agents call custom_get_lead_import_warnings to retrieve information from Marketo MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves import warnings related to lead imports, which is a query operation that does not modify, execute, or delete data. The [CUSTOM] notation and direct API call do not elevate the risk category; the functional purpose remains data retrieval. The blast radius of misuse is limited to information disclosure, making this a low-severity read operation.
From the tool's definition Tool name indicates a retrieval of warnings (get_lead_import_warnings), and description indicates it calls the Marketo REST API to fetch data. The 'get' verb and 'warnings' retrieval pattern suggest read-only data access with no side effects.
Attacks that exploit this kind of access
[CUSTOM] Calls the Marketo REST API directly (not Adobe's native MCP). It is categorised as a Read tool in the Marketo MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Marketo MCP Server MCP server in PolicyLayer and add a rule for custom_get_lead_import_warnings: 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 Marketo MCP Server. Nothing to install.
custom_get_lead_import_warnings 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 custom_get_lead_import_warnings 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 custom_get_lead_import_warnings. 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.
custom_get_lead_import_warnings is provided by the Marketo MCP Server MCP server (tyron-pretorius/marketo-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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