set_page_emoji · Collectives MCP: Risk & Policy

WHAT IT DOES

What set_page_emoji does on Collectives

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

WHY IT NEEDS A POLICY

Why set_page_emoji needs a policy

This tool creates or modifies page properties (the emoji icon) in a reversible manner. The change can be undone by setting a different emoji or clearing it. It does not delete data, execute code, move money, or trigger external operations—it only updates a cosmetic page attribute.

From the tool's definition The tool description states it 'Set[s] the single-emoji icon on a page' and allows passing 'an empty string to clear', indicating it modifies page metadata (the emoji icon) reversibly without deletion or permanent destruction.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_page_emoji Rate-limited

set_page_emoji 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": {
    "set_page_emoji": {
      "limits": [
        {
          "counter": "set_page_emoji_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Collectives, so you can run agents against it safely.

FAQ

Questions about set_page_emoji

What does the set_page_emoji tool do? +

Set the single-emoji icon on a page. Pass an empty string to clear. It is categorised as a Write tool in the Collectives MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_page_emoji? +

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

What risk level is set_page_emoji? +

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

Can I rate-limit set_page_emoji? +

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

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

set_page_emoji is provided by the Collectives MCP server (megamaced/nc_collectives-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.