set_project_thumbnail

Set or update the project thumbnail image (thumb.png) used for publishing. Provide either a source path or base64 image data

SERVERSbox SOURCEsbox-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/sbox/set-project-thumbnail.md

WHAT IT DOES

What set_project_thumbnail does on Sbox

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

RISK

Why set_project_thumbnail is rated Medium

This tool modifies project metadata (the thumbnail image file) in a reversible manner. It does not delete data, execute arbitrary code, move money, or trigger external operations. The severity is medium because misuse could affect project visibility/representation in publishing contexts, but the change is easily reversible by setting a different thumbnail.

From the tool's definition Tool description states it will 'Set or update the project thumbnail image' — a clear modification operation. The tool creates or modifies a file (thumb.png) used for publishing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set_project_thumbnail safely

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

set_project_thumbnail Rate-limited

set_project_thumbnail 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_project_thumbnail": {
      "limits": [
        {
          "counter": "set_project_thumbnail_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 Sbox, apply this rule, and every set_project_thumbnail call is checked against it from then on.

FAQ

Questions about set_project_thumbnail

What does the set_project_thumbnail tool do? +

Set or update the project thumbnail image (thumb.png) used for publishing. Provide either a source path or base64 image data. It is categorised as a Write tool in the Sbox 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_project_thumbnail? +

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

What risk level is set_project_thumbnail? +

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

Can I rate-limit set_project_thumbnail? +

Yes. Add a rate_limit block to the set_project_thumbnail 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_project_thumbnail completely? +

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

set_project_thumbnail is provided by the Sbox MCP server (sbox-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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