create_adjustment · TreeBeam MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_adjustment does on TreeBeam MCP Server

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

WHY IT NEEDS A POLICY

Why create_adjustment needs a policy

This tool creates new financial adjustments (accounting records) that modify accounts or balances in a financial system. Although it is reversible (deletions are available via delete_adjustment), creating financial adjustments is a Write operation that modifies the accounting ledger and could materially alter financial records if misused by an AI agent without proper authorization or context.

From the tool's definition Tool description explicitly states 'Create a new adjustment header within a project' — the verb 'create' combined with the noun 'adjustment' in a financial/accounting context indicates data creation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_adjustment Rate-limited

create_adjustment 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": {
    "create_adjustment": {
      "limits": [
        {
          "counter": "create_adjustment_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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Instant setup, no code required.

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

FAQ

Questions about create_adjustment

What does the create_adjustment tool do? +

Create a new adjustment header within a project. To add line items, call create_adjustment_line_item for each line after this returns. It is categorised as a Write tool in the TreeBeam MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_adjustment? +

Register the TreeBeam MCP Server MCP server in PolicyLayer and add a rule for create_adjustment: 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 TreeBeam MCP Server. Nothing to install.

What risk level is create_adjustment? +

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

Can I rate-limit create_adjustment? +

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

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

create_adjustment is provided by the TreeBeam MCP Server MCP server (treebeam-code/tb-mcpserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.