find_empty_space

Scan one area of the canvas and find where a rectangle of blank tiles fits.

SERVER21millionpixels SOURCE21millionpixels-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade A, identity unverified Pull the record →

This record as markdown: /tools/21millionpixels-mcp/find-empty-space.md

WHAT IT DOES

What find_empty_space does on 21millionpixels

AI agents call find_empty_space to retrieve information from 21millionpixels without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why find_empty_space is rated Low

Even though find_empty_space only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs find_empty_space safely

PolicyLayer is an MCP gateway: it sits between your AI agents and 21millionpixels, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For find_empty_space, this is the rule to start with:

find_empty_space Allowed

find_empty_space is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "find_empty_space": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect 21millionpixels, apply this rule, and every find_empty_space call is checked against it from then on.

FAQ

Questions about find_empty_space

What does the find_empty_space tool do? +

Scan one area of the canvas and find where a rectangle of blank tiles fits. It is categorised as a Read tool in the 21millionpixels MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on find_empty_space? +

Register the 21millionpixels MCP server in PolicyLayer and add a rule for find_empty_space: 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 21millionpixels. Nothing to install.

What risk level is find_empty_space? +

find_empty_space is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit find_empty_space? +

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

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

find_empty_space is provided by the 21millionpixels MCP server (21millionpixels-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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Guides

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