create_relation · Vikunja MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_relation does on Vikunja MCP Server

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

WHY IT NEEDS A POLICY

Why create_relation needs a policy

This tool creates a new association (relation) between two tasks, which is a data creation operation. It is reversible (relations can be deleted, as evidenced by the sibling tool 'delete_relation'), so it falls under Write rather than Destructive. It has minimal blast radius—a misused relation between tasks would not cause financial loss, code execution, or irreversible data destruction.

From the tool's definition Tool name 'create_relation' and description 'Create a relation between two tasks' indicate a reversible creation operation that establishes a link between existing entities without modifying their core data or side effects beyond the relation itself.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_relation Rate-limited

create_relation 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": {
    "create_relation": {
      "limits": [
        {
          "counter": "create_relation_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 Vikunja MCP Server, so you can run agents against it safely.

FAQ

Questions about create_relation

What does the create_relation tool do? +

Create a relation between two tasks. It is categorised as a Write tool in the Vikunja MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_relation? +

Register the Vikunja MCP Server MCP server in PolicyLayer and add a rule for create_relation: 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 Vikunja MCP Server. Nothing to install.

What risk level is create_relation? +

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

Can I rate-limit create_relation? +

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

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

create_relation is provided by the Vikunja MCP Server MCP server (wosh-i/vikunja-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.