get_collection_stats

THE RISK

Low Risk

Why get_collection_stats needs a policy

This tool queries and returns aggregated data about an existing Bruno API testing collection. It performs a read-only operation that retrieves statistics without creating, modifying, deleting, or executing anything. No reversible or irreversible changes occur, and no code or external operations are triggered.

From the tool's definition Tool name is 'get_collection_stats' and description states it 'Get[s] detailed statistics about a Bruno collection' — a retrieval operation with no modifications or side effects.

Documented attack patterns abuse exactly the kind of access get_collection_stats gives an agent:

POLICY

How to control get_collection_stats

PolicyLayer is an MCP gateway — it sits between your AI agents and Bruno MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_collection_stats:

policy.json

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

get_collection_stats is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Bruno MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Bruno MCP Server tools

Write add_test_script Add pre-request or post-response scripts to Bruno requests Write create_collection Create a new Bruno API testing collection with configuration Write create_crud_requests Generate a complete set of CRUD operations for an entity Write create_environment Create environment configuration files for Bruno collection Write create_request Generate .bru request files for API testing Write create_test_suite Generate comprehensive test collections with multiple related requests Read list_collections List all Bruno collections in a directory

All 8 Bruno MCP Server tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_collection_stats

What does the get_collection_stats tool do? +

Get detailed statistics about a Bruno collection. It is categorised as a Read tool in the Bruno MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_collection_stats? +

Register the Bruno MCP Server MCP server in PolicyLayer and add a rule for get_collection_stats: 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 Bruno MCP Server. Nothing to install.

What risk level is get_collection_stats? +

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

Can I rate-limit get_collection_stats? +

Yes. Add a rate_limit block to the get_collection_stats 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 get_collection_stats completely? +

Set action: deny in the PolicyLayer policy for get_collection_stats. 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 get_collection_stats? +

get_collection_stats is provided by the Bruno MCP Server MCP server (macarthy/bruno-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Bruno MCP Server tool call.

Start from Bruno MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →