pin_attachment

Pin or unpin an attachment.

SERVERHuly SOURCE@firfi/huly-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-dearlordylord-huly-mcp/pin-attachment.md

WHAT IT DOES

What pin_attachment does on Huly

AI agents use pin_attachment to create or update resources in Huly, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Huly environment.

RISK

Why pin_attachment is rated Medium

Pinning/unpinning is a write operation that changes the status or presentation of an attachment (toggling a boolean flag or similar state). It is reversible (can be undone by unpinning), so it does not qualify as Destructive. It does not execute arbitrary code or trigger external processes, so it is not Execute.

From the tool's definition Tool performs 'pin or unpin an attachment' — a reversible state change operation that modifies metadata/visibility of existing data without deletion.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

pin_attachment Rate-limited

pin_attachment stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "pin_attachment": {
      "limits": [
        {
          "counter": "pin_attachment_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about pin_attachment

What does the pin_attachment tool do? +

Pin or unpin an attachment. It is categorised as a Write tool in the Huly MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on pin_attachment? +

Register the Huly MCP server in PolicyLayer and add a rule for pin_attachment: 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 pin_attachment? +

pin_attachment is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit pin_attachment? +

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

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

pin_attachment 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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