create_milestone

Create a new milestone for a project

SERVERLinear Kanban Server SOURCE0xikarus/linear-kanban-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/0xikarus-linear-kanban-mcp/create-milestone.md

WHAT IT DOES

What create_milestone does on Linear Kanban Server

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

RISK

Why create_milestone is rated Medium

This tool creates a new milestone, which is a reversible write operation—milestones can be updated, deleted, or modified later. It does not execute arbitrary code, delete data irreversibly, or move money. The severity is medium because misuse could create unwanted milestones that clutter project tracking, but the impact is containable through standard project management cleanup operations.

From the tool's definition Tool name 'create_milestone' and description 'Create a new milestone for a project' indicate creation of a new data object in Linear's project management system.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_milestone safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Linear Kanban Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For create_milestone, this is the rule to start with:

create_milestone Rate-limited

create_milestone 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_milestone": {
      "limits": [
        {
          "counter": "create_milestone_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 Linear Kanban Server, apply this rule, and every create_milestone call is checked against it from then on.

FAQ

Questions about create_milestone

What does the create_milestone tool do? +

Create a new milestone for a project. It is categorised as a Write tool in the Linear Kanban 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_milestone? +

Register the Linear Kanban Server MCP server in PolicyLayer and add a rule for create_milestone: 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 Linear Kanban Server. Nothing to install.

What risk level is create_milestone? +

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

Can I rate-limit create_milestone? +

Yes. Add a rate_limit block to the create_milestone 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_milestone completely? +

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

create_milestone is provided by the Linear Kanban Server MCP server (0xikarus/linear-kanban-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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