depreciation_straight_line · Excel Finance MCP

WHAT IT DOES

What depreciation_straight_line does on Excel Finance MCP

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

WHY IT NEEDS A POLICY

Why depreciation_straight_line needs a policy

While depreciation calculations themselves are read-only computations, this tool's purpose within the Excel Finance MCP context is to generate and populate a schedule (a data artifact) in financial workbooks. This is a Write operation because it creates structured financial data that can be modified or replaced.

From the tool's definition The tool creates a depreciation schedule, which involves generating and storing calculated financial data in Excel workbooks.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

depreciation_straight_line Rate-limited

depreciation_straight_line 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": {
    "depreciation_straight_line": {
      "limits": [
        {
          "counter": "depreciation_straight_line_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about depreciation_straight_line

What does the depreciation_straight_line tool do? +

Calculate straight-line depreciation schedule. It is categorised as a Write tool in the Excel Finance MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on depreciation_straight_line? +

Register the Excel Finance MCP server in PolicyLayer and add a rule for depreciation_straight_line: 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 Excel Finance MCP. Nothing to install.

What risk level is depreciation_straight_line? +

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

Can I rate-limit depreciation_straight_line? +

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

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

depreciation_straight_line is provided by the Excel Finance MCP server (jeremycharlesgillespie/excel-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.