List all email sequences in your Apollo account. Sequences are automated email campaigns.
AI agents call list_sequences to retrieve information from Apollo Io 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 and enumerates existing email sequences without modifying, executing, or deleting them. It is purely informational, making it a Read category tool. Severity is low because listing sequences poses minimal risk—it only exposes metadata about existing campaigns without triggering actions or exposing sensitive user data beyond what the account holder already controls.
From the tool's definition Tool name 'list_sequences' and description 'List all email sequences in your Apollo account' indicate a retrieval operation with no modification or execution of campaigns.
Attacks that exploit this kind of access
List all email sequences in your Apollo account. Sequences are automated email campaigns. It is categorised as a Read tool in the Apollo Io MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Apollo Io MCP Server MCP server in PolicyLayer and add a rule for list_sequences: 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 Apollo Io MCP Server. Nothing to install.
list_sequences 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 list_sequences 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 list_sequences. 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.
list_sequences is provided by the Apollo Io MCP Server MCP server (masridigital/apollo.io-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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