rhino_bridge_list_instances

Enumerate live Rhino bridge endpoints discovered via announcement files.

SERVERRhino SOURCEeasehee/rhino-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/easehee-rhino-mcp/rhino-bridge-list-instances.md

WHAT IT DOES

What rhino_bridge_list_instances does on Rhino

AI agents call rhino_bridge_list_instances to retrieve information from Rhino without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why rhino_bridge_list_instances is rated Low

The tool performs discovery/enumeration of existing bridge instances, which is a read-only operation with no side effects. It gathers metadata about what Rhino bridge endpoints are available. This has minimal security risk as it only retrieves status information.

From the tool's definition Tool name contains 'list' and description says 'Enumerate live Rhino bridge endpoints discovered via announcement files' — this is a query operation that retrieves information about available endpoints without modifying or executing anything.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs rhino_bridge_list_instances safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Rhino, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For rhino_bridge_list_instances, this is the rule to start with:

rhino_bridge_list_instances Allowed

rhino_bridge_list_instances is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "rhino_bridge_list_instances": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Rhino, apply this rule, and every rhino_bridge_list_instances call is checked against it from then on.

FAQ

Questions about rhino_bridge_list_instances

What does the rhino_bridge_list_instances tool do? +

Enumerate live Rhino bridge endpoints discovered via announcement files. It is categorised as a Read tool in the Rhino MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on rhino_bridge_list_instances? +

Register the Rhino MCP server in PolicyLayer and add a rule for rhino_bridge_list_instances: 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 Rhino. Nothing to install.

What risk level is rhino_bridge_list_instances? +

rhino_bridge_list_instances is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit rhino_bridge_list_instances? +

Yes. Add a rate_limit block to the rhino_bridge_list_instances 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.

How do I block rhino_bridge_list_instances completely? +

Set action: deny in the PolicyLayer policy for rhino_bridge_list_instances. 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.

What MCP server provides rhino_bridge_list_instances? +

rhino_bridge_list_instances is provided by the Rhino MCP server (easehee/rhino-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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