update_attachment

Update attachment metadata (description, pinned status).

SERVERHuly SOURCEdugynoo/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/dugynoo-huly-mcp/update-attachment.md

WHAT IT DOES

What update_attachment does on Huly

AI agents use update_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 update_attachment is rated Medium

This tool modifies metadata fields (description, pinned status) of attachments but does not delete or destroy data, nor does it execute arbitrary operations or commit financial transactions. Metadata updates are reversible and fall squarely into the Write category. The blast radius is minimal since changing descriptions or pin status has no cascading security or operational impact.

From the tool's definition Tool name 'update_attachment' and description stating it 'Update[s] attachment metadata (description, pinned status)' indicates modification of existing data fields in a reversible manner.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

update_attachment Rate-limited

update_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": {
    "update_attachment": {
      "limits": [
        {
          "counter": "update_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 update_attachment call is checked against it from then on.

FAQ

Questions about update_attachment

What does the update_attachment tool do? +

Update attachment metadata (description, pinned status). 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 update_attachment? +

Register the Huly MCP server in PolicyLayer and add a rule for update_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 update_attachment? +

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

Can I rate-limit update_attachment? +

Yes. Add a rate_limit block to the update_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 update_attachment completely? +

Set action: deny in the PolicyLayer policy for update_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 update_attachment? +

update_attachment is provided by the Huly MCP server (dugynoo/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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