read_sheet

Read data from Google Sheets

SERVERNcp SOURCE@portel/ncp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-portel-dev-ncp/read-sheet.md

WHAT IT DOES

What read_sheet does on Ncp

AI agents call read_sheet to retrieve information from Ncp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why read_sheet is rated Low

This tool retrieves or queries data from Google Sheets without creating, modifying, or deleting any data. It has no side effects on the source system. The action is purely informational and read-only, making it a Read category tool with low severity risk.

From the tool's definition Tool name is 'read_sheet' and description explicitly states 'Read data from Google Sheets' — both indicate a retrieval operation with no modification.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs read_sheet safely

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

read_sheet Allowed

read_sheet is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "read_sheet": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Ncp, apply this rule, and every read_sheet call is checked against it from then on.

FAQ

Questions about read_sheet

What does the read_sheet tool do? +

Read data from Google Sheets. It is categorised as a Read tool in the Ncp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on read_sheet? +

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

What risk level is read_sheet? +

read_sheet is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit read_sheet? +

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

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

read_sheet is provided by the Ncp MCP server (@portel/ncp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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