append_rows_to_table

A write tool on the AWS MCP server.

SERVERAWS SOURCE@awslabs/mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity verified Pull the record →

This record as markdown: /tools/aws/append-rows-to-table.md

WHAT IT DOES

What append_rows_to_table does on AWS

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

RISK

Why append_rows_to_table is rated Medium

The name implies writing new rows to an existing table, which is a reversible data modification (Write). However, since the description is empty, confidence is reduced. It could be an Execute-level tool if it runs SQL, but the name suggests a higher-level data operation. Severity is medium due to potential for bulk data insertion affecting data integrity.

From the tool's definition Tool name 'append_rows_to_table' suggests adding rows to a table (a write/create operation). Description is empty, so classification is based on name alone.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs append_rows_to_table safely

PolicyLayer is an MCP gateway: it sits between your AI agents and AWS, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For append_rows_to_table, this is the rule to start with:

append_rows_to_table Rate-limited

append_rows_to_table 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_to_table": {
      "limits": [
        {
          "counter": "append_rows_to_table_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 AWS, apply this rule, and every append_rows_to_table call is checked against it from then on.

FAQ

Questions about append_rows_to_table

What does the append_rows_to_table tool do? +

append_rows_to_table is a write tool on the AWS MCP server. It is categorised as a Write tool in the AWS 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_to_table? +

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

What risk level is append_rows_to_table? +

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

Can I rate-limit append_rows_to_table? +

Yes. Add a rate_limit block to the append_rows_to_table 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_to_table completely? +

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

append_rows_to_table is provided by the AWS MCP server (@awslabs/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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