AI agents call ruyipage_describe_capabilities to retrieve information from Ruyipage without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and reports internal server state information (sessions, counts, switches). It has no ability to modify data, execute arbitrary operations, or interact with external systems. The blast radius if misused by an AI agent is minimal—it only exposes metadata about the current state of the browser automation server.
From the tool's definition The tool description states it 'Return[s] the current server state: active sessions, element counts, capability switches.' These are passive read operations that retrieve state information without modifying, executing code, or causing side effects.
Attacks that exploit this kind of access
Return the current server state: active sessions, element counts, capability switches. It is categorised as a Read tool in the Ruyipage MCP Server, which means it retrieves data without modifying state.
Register the Ruyipage MCP server in PolicyLayer and add a rule for ruyipage_describe_capabilities: 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 Ruyipage. Nothing to install.
ruyipage_describe_capabilities 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 ruyipage_describe_capabilities 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 ruyipage_describe_capabilities. 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.
ruyipage_describe_capabilities is provided by the Ruyipage MCP server (neverl805/ruyipage_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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