list_activity_references

List activity references connected to a raw Huly object. Use direction to list references from the object, to the object, or both.

SERVERHuly SOURCE@firfi/huly-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/io-github-dearlordylord-huly-mcp/list-activity-references.md

WHAT IT DOES

What list_activity_references does on Huly

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

RISK

Why list_activity_references is rated Low

This tool queries and returns existing data (activity references) without any side effects. It is a retrieval operation that does not modify, execute, delete, or create data. The blast radius of misuse is minimal—at worst, an agent could enumerate references to sensitive objects, but cannot alter or destroy them. This clearly fits the Read category with low severity.

From the tool's definition Tool name contains 'list' and description explicitly states 'List activity references'. The operation retrieves/queries references connected to objects with no mention of modification, creation, or deletion.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_activity_references safely

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

list_activity_references Allowed

list_activity_references 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": {
    "list_activity_references": {}
  }
}

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

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

FAQ

Questions about list_activity_references

What does the list_activity_references tool do? +

List activity references connected to a raw Huly object. Use direction to list references from the object, to the object, or both. It is categorised as a Read tool in the Huly MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_activity_references? +

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

What risk level is list_activity_references? +

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

Can I rate-limit list_activity_references? +

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

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

list_activity_references is provided by the Huly MCP server (@firfi/huly-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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