列出当前模型的所有可用表情及其描述。需先执行 model_load。
AI agents call expression_list to retrieve information from Live2d To Agent without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays information about available expressions in a Live2D model. It performs a read-only operation that queries the state of the system without modifying, executing external code, or causing any irreversible changes. The description explicitly indicates a listing/retrieval action (列出 = 'list').
From the tool's definition Tool name 'expression_list' and description indicate it 'lists all available expressions and their descriptions' (列出当前模型的所有可用表情及其描述) for the current model. This is a query/enumeration operation with no side effects.
Attacks that exploit this kind of access
列出当前模型的所有可用表情及其描述。需先执行 model_load。. It is categorised as a Read tool in the Live2d To Agent MCP Server, which means it retrieves data without modifying state.
Register the Live2d To Agent MCP server in PolicyLayer and add a rule for expression_list: 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 Live2d To Agent. Nothing to install.
expression_list 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 expression_list 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 expression_list. 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.
expression_list is provided by the Live2d To Agent MCP server (lmy414/live2d-to-agent). 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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