Get the set of fields enabled for Email CC in the Marketo instance.
AI agents call get_email_cc_fields 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 queries and retrieves email CC field configuration from Marketo. It performs a read-only operation that returns existing settings without creating, modifying, deleting, or executing any actions. The blast radius of misuse is minimal — an attacker gains only visibility into which fields are available for email CC functionality, not access to modify email behavior or send unauthorized messages.
From the tool's definition Tool name 'get_email_cc_fields' uses 'get' verb and description states 'Get the set of fields' — retrieves configuration data without modification. No side effects or state changes.
Attacks that exploit this kind of access
Get the set of fields enabled for Email CC in the Marketo instance. 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 get_email_cc_fields: 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.
get_email_cc_fields 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 get_email_cc_fields 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 get_email_cc_fields. 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.
get_email_cc_fields 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.
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