AI agents call list_heroes to retrieve information from 聚义厅MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and presents information about available AI personas/heroes without modifying data, executing code, or performing any side effects. It is a straightforward read operation similar to list or query commands that have no impact beyond retrieving and displaying existing data.
From the tool's definition Tool name 'list_heroes' with description '显示聚义厅中所有可用的英雄角色' (Display all available hero roles in 聚义厅) — a display/listing operation with no data modification or execution capability.
Attacks that exploit this kind of access
显示聚义厅中所有可用的英雄角色. It is categorised as a Read tool in the 聚义厅MCP MCP Server, which means it retrieves data without modifying state.
Register the 聚义厅 MCP server in PolicyLayer and add a rule for list_heroes: 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 聚义厅MCP. Nothing to install.
list_heroes 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_heroes 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_heroes. 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_heroes is provided by the 聚义厅 MCP server (juyitingmcp/juyitingmcp). 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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