sdk_change_buffer_enable · UI Bridge MCP: Risk & Policy

WHAT IT DOES

What sdk_change_buffer_enable does on UI Bridge MCP

AI agents invoke sdk_change_buffer_enable to trigger actions in UI Bridge MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why sdk_change_buffer_enable needs a policy

This tool triggers an operational mode change in the UI Bridge system — enabling a buffering mechanism that accumulates UI diffs until explicitly drained. This is an external operation that modifies system behavior (not just data), making it Execute. Misuse could cause UI state changes to be silently buffered and not applied, potentially causing confusion or blocking UI interactions, hence medium severity.

From the tool's definition Enable change buffering. All diffs are accumulated until drained.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sdk_change_buffer_enable Rate-limited

sdk_change_buffer_enable stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "sdk_change_buffer_enable": {
      "limits": [
        {
          "counter": "sdk_change_buffer_enable_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches UI Bridge MCP, so you can run agents against it safely.

FAQ

Questions about sdk_change_buffer_enable

What does the sdk_change_buffer_enable tool do? +

Enable change buffering. All diffs are accumulated until drained. It is categorised as a Execute tool in the UI Bridge MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on sdk_change_buffer_enable? +

Register the UI Bridge MCP server in PolicyLayer and add a rule for sdk_change_buffer_enable: 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 UI Bridge MCP. Nothing to install.

What risk level is sdk_change_buffer_enable? +

sdk_change_buffer_enable is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit sdk_change_buffer_enable? +

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

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

sdk_change_buffer_enable is provided by the UI Bridge MCP server (qontinui/ui-bridge-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.