rhino_block_list

List every block definition with a per-definition object + instance count.

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-block-list.md

WHAT IT DOES

What rhino_block_list does on Rhino

AI agents call rhino_block_list 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_block_list is rated Low

This tool performs a read-only retrieval operation on block metadata. It has no side effects, does not execute code or commands, does not modify data, and does not delete or move resources. The blast radius of misuse is minimal — an agent retrieving this information cannot cause damage to the Rhino model or external systems.

From the tool's definition Tool name is 'rhino_block_list' and description states it 'List[s] every block definition' — a query operation that retrieves data about block definitions and instance counts without modifying or executing anything.

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs rhino_block_list 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_block_list, this is the rule to start with:

rhino_block_list Allowed

rhino_block_list 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_block_list": {}
  }
}

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_block_list call is checked against it from then on.

FAQ

Questions about rhino_block_list

What does the rhino_block_list tool do? +

List every block definition with a per-definition object + instance count. 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_block_list? +

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

What risk level is rhino_block_list? +

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

Can I rate-limit rhino_block_list? +

Yes. Add a rate_limit block to the rhino_block_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.

How do I block rhino_block_list completely? +

Set action: deny in the PolicyLayer policy for rhino_block_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.

What MCP server provides rhino_block_list? +

rhino_block_list 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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