theme_set_constant

Set an integer constant entry on a Theme resource file and save it (e.g. h_separation for a BoxContainer). DESTRUCTIVE (writes a file) — gated by confirmation.

SERVERBreakpoint SOURCEbreakpoint-mcp

Medium RISK CLASS

Category Write

Parameters 54 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/breakpoint-mcp/theme-set-constant.md

WHAT IT DOES

What theme_set_constant does on Breakpoint

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

Parameter	Type	Required	Description
`name`	string	Yes	Theme item name, e.g. h_separation, margin_left
`path`	string	Yes	Theme res:// path
`value`	integer	Yes	Integer constant value
`confirm`	boolean	—	Auto-approve this destructive action (skip the confirmation prompt)
`theme_type`	string	Yes	Theme type the item belongs to, e.g. HBoxContainer, MarginContainer

Parameters from the server's own tool schema.

RISK

Why theme_set_constant is rated Medium

While the tool writes to a file and saves changes, the action is reversible (a subsequent call can change the value back) and is gated by confirmation, making it a Write operation rather than Destructive. The blast radius is medium—misuse could corrupt theme resources or render UI elements incorrectly, but the operation is not irreversible and can be undone.

From the tool's definition The description states it "Set[s] an integer constant entry on a Theme resource file and save[s] it", which modifies file content.

Risk signalsAccepts file system path (path)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs theme_set_constant safely

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

theme_set_constant Rate-limited

theme_set_constant 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": {
    "theme_set_constant": {
      "limits": [
        {
          "counter": "theme_set_constant_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 Breakpoint, apply this rule, and every theme_set_constant call is checked against it from then on.

FAQ

Questions about theme_set_constant

What does the theme_set_constant tool do? +

Set an integer constant entry on a Theme resource file and save it (e.g. h_separation for a BoxContainer). DESTRUCTIVE (writes a file) — gated by confirmation. It is categorised as a Write tool in the Breakpoint MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does theme_set_constant accept? +

theme_set_constant accepts 5 parameters: name, path, value, confirm, theme_type. Required: name, path, value, theme_type. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on theme_set_constant? +

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

What risk level is theme_set_constant? +

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

Can I rate-limit theme_set_constant? +

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

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

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

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