AI agents call hs_list_marketing_emails to retrieve information from Hubspot without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries marketing email records from HubSpot with optional filtering. It has no side effects—it does not create, modify, delete, or execute any operations. The capability is purely informational retrieval, fitting the Read category.
From the tool's definition Tool name contains 'list' and description states 'List marketing emails' with optional filtering by state. No modification, deletion, or execution language present.
Attacks that exploit this kind of access
List marketing emails, optionally filtered by publication state (DRAFT, SCHEDULED, PUBLISHED, ARCHIVED). It is categorised as a Read tool in the Hubspot MCP Server, which means it retrieves data without modifying state.
Register the Hubspot MCP server in PolicyLayer and add a rule for hs_list_marketing_emails: 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 Hubspot. Nothing to install.
hs_list_marketing_emails 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 hs_list_marketing_emails 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 hs_list_marketing_emails. 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.
hs_list_marketing_emails is provided by the Hubspot MCP server (zleventer/hubspot-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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