append_rows · Integrations MCP: Risk & Policy

WHAT IT DOES

What append_rows does on Integrations MCP

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

WHY IT NEEDS A POLICY

Why append_rows needs a policy

The name 'append_rows' strongly implies a write operation — adding new rows to some data store (likely a spreadsheet or table, given the context of tools like airtable_create_record on the same server). Appending is a reversible write operation. Severity is medium due to potential for data corruption or unintended bulk inserts. Confidence is lowered due to empty description.

From the tool's definition Tool name 'append_rows' suggests adding rows to a dataset or spreadsheet; description is empty and uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

append_rows Rate-limited

append_rows 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": {
    "append_rows": {
      "limits": [
        {
          "counter": "append_rows_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 Integrations MCP, so you can run agents against it safely.

FAQ

Questions about append_rows

What does the append_rows tool do? +

append_rows. It is categorised as a Write tool in the Integrations 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 append_rows? +

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

What risk level is append_rows? +

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

Can I rate-limit append_rows? +

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

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

append_rows is provided by the Integrations MCP server (shriram-vasudevan/integrations-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.