capacities_create_object · Capacities MCP Worker MCP

WHAT IT DOES

What capacities_create_object does on Capacities MCP Worker

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

WHY IT NEEDS A POLICY

Why capacities_create_object needs a policy

This tool creates new objects in a knowledge management system. It modifies data but does not delete, destroy, or financially obligate. Creation is reversible (objects can be deleted later), making it a Write operation. Severity is medium because misuse could create unwanted clutter in a user's knowledge base, but the impact is limited to that user's Capacities instance and the action is non-destructive.

From the tool's definition Tool description explicitly states 'Create a new object (page, note, or any custom type) in Capacities', which is a create operation that modifies data in the knowledge base reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

capacities_create_object Rate-limited

capacities_create_object 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": {
    "capacities_create_object": {
      "limits": [
        {
          "counter": "capacities_create_object_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 Capacities MCP Worker, so you can run agents against it safely.

FAQ

Questions about capacities_create_object

What does the capacities_create_object tool do? +

Create a new object (page, note, or any custom type) in Capacities. Use get_space_info first to find available structureIds for the space. It is categorised as a Write tool in the Capacities MCP Worker MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on capacities_create_object? +

Register the Capacities MCP Worker MCP server in PolicyLayer and add a rule for capacities_create_object: 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 Capacities MCP Worker. Nothing to install.

What risk level is capacities_create_object? +

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

Can I rate-limit capacities_create_object? +

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

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

capacities_create_object is provided by the Capacities MCP Worker MCP server (tieubao/capacities-mcp-worker). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.