unity_navmesh_add_obstacle

Add a NavMeshObstacle component to a GameObject.

SERVERUnity MCP Server SOURCEanklebreaker-studio/unity-mcp-server

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/anklebreaker-studio-unity-mcp-server/unity-navmesh-add-obstacle.md

WHAT IT DOES

What unity_navmesh_add_obstacle does on Unity MCP Server

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

RISK

Why unity_navmesh_add_obstacle is rated Medium

This tool adds a component to a GameObject in the Unity scene, modifying the game's state. This is a write operation because it creates/modifies data (component addition) that can be undone or removed. It is not destructive because the change is reversible.

From the tool's definition Tool name 'unity_navmesh_add_obstacle' and description 'Add a NavMeshObstacle component to a GameObject' indicate creation/modification of game object components, which is a reversible write operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs unity_navmesh_add_obstacle safely

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

unity_navmesh_add_obstacle Rate-limited

unity_navmesh_add_obstacle 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": {
    "unity_navmesh_add_obstacle": {
      "limits": [
        {
          "counter": "unity_navmesh_add_obstacle_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 Unity MCP Server, apply this rule, and every unity_navmesh_add_obstacle call is checked against it from then on.

FAQ

Questions about unity_navmesh_add_obstacle

What does the unity_navmesh_add_obstacle tool do? +

Add a NavMeshObstacle component to a GameObject. It is categorised as a Write tool in the Unity 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 unity_navmesh_add_obstacle? +

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

What risk level is unity_navmesh_add_obstacle? +

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

Can I rate-limit unity_navmesh_add_obstacle? +

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

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

unity_navmesh_add_obstacle is provided by the Unity MCP Server MCP server (anklebreaker-studio/unity-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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