List available HeyGen avatars including stock and custom Instant Avatars.
AI agents call list_avatars to retrieve information from VideoGen Advisor without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple enumeration/listing of existing avatar resources. It has no side effects, does not create, modify, or delete data, does not execute code or trigger external operations, and does not involve financial transactions. The blast radius of misuse is minimal—an agent could only exhaust API quota or gather information about available avatars.
From the tool's definition Tool name 'list_avatars' and description 'List available HeyGen avatars' indicate a read-only query operation that retrieves and displays data without modification, creation, deletion, or execution of code.
Attacks that exploit this kind of access
List available HeyGen avatars including stock and custom Instant Avatars. It is categorised as a Read tool in the VideoGen Advisor MCP Server, which means it retrieves data without modifying state.
Register the VideoGen Advisor MCP server in PolicyLayer and add a rule for list_avatars: 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 VideoGen Advisor. Nothing to install.
list_avatars 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_avatars 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_avatars. 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_avatars is provided by the VideoGen Advisor MCP server (m2ai-mcp-servers/mcp-videogen-router). 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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