runtime_set_property

Set a property on a live node. DESTRUCTIVE (mutates running game state) — gated by confirmation. Rich types use the {"__type__":...} convention.

SERVERBreakpoint SOURCEbreakpoint-mcp

Medium RISK CLASS

Category Write

Parameters 52 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/breakpoint-mcp/runtime-set-property.md

WHAT IT DOES

What runtime_set_property does on Breakpoint

AI agents use runtime_set_property 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
`path`	string	Yes
`peer`	string	—	Target a headless peer by id (from runtime_spawn_peers). Omit to address the default running game.
`value`	object	—
`confirm`	boolean	—	Auto-approve this destructive action (skip the confirmation prompt)
`property`	string	Yes

Parameters from the server's own tool schema.

RISK

Why runtime_set_property is rated Medium

An AI agent can call runtime_set_property faster than any human can review: one bad instruction and it creates or modifies resources in Breakpoint by the hundred, each call as confident as the last.

Risk signalsAccepts file system path (path)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs runtime_set_property 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 runtime_set_property, this is the rule to start with:

runtime_set_property Rate-limited

runtime_set_property 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": {
    "runtime_set_property": {
      "limits": [
        {
          "counter": "runtime_set_property_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 runtime_set_property call is checked against it from then on.

FAQ

Questions about runtime_set_property

What does the runtime_set_property tool do? +

Set a property on a live node. DESTRUCTIVE (mutates running game state) — gated by confirmation. Rich types use the {"__type__":...} convention. 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 runtime_set_property accept? +

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

How do I enforce a policy on runtime_set_property? +

Register the Breakpoint MCP server in PolicyLayer and add a rule for runtime_set_property: 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 runtime_set_property? +

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

Can I rate-limit runtime_set_property? +

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

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

runtime_set_property 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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