pin_activity_message

Pin or unpin an activity message. Idempotent when the pin state already matches.

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-activity-message.md

WHAT IT DOES

What pin_activity_message does on Huly

AI agents use pin_activity_message 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_activity_message is rated Medium

This tool modifies the pin state of an activity message, making it a Write operation. It is reversible (can be unpinned) and affects only metadata/display properties, not core data destruction. The severity is medium because misuse could clutter or hide important messages from team visibility, affecting collaboration workflows, but the change is easily reversible.

From the tool's definition 'Pin or unpin an activity message' indicates modification of message state/metadata. The tool changes the pin status of an existing activity message, which is a reversible state modification rather than content deletion or irreversible destruction.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

pin_activity_message Rate-limited

pin_activity_message 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_activity_message": {
      "limits": [
        {
          "counter": "pin_activity_message_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_activity_message call is checked against it from then on.

FAQ

Questions about pin_activity_message

What does the pin_activity_message tool do? +

Pin or unpin an activity message. Idempotent when the pin state already matches. 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_activity_message? +

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

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

Can I rate-limit pin_activity_message? +

Yes. Add a rate_limit block to the pin_activity_message 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_activity_message completely? +

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

pin_activity_message 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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