post_data

Send data to twitter-api-v2

SERVERNcp SOURCE@portel/ncp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-portel-dev-ncp/post-data.md

WHAT IT DOES

What post_data does on Ncp

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

RISK

Why post_data is rated Medium

This tool creates new data (posts/tweets) on Twitter, which is a reversible write operation. While it modifies external state, tweets can be deleted, making it Write rather than Destructive. Severity is medium because misuse could spam, harass, or damage reputation, but the blast radius is limited to the Twitter account's reach and can be remediated by deletion.

From the tool's definition Tool name is 'post_data' and description states it 'Send[s] data to twitter-api-v2', indicating it creates or posts content to an external service.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs post_data 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 post_data, this is the rule to start with:

post_data Rate-limited

post_data 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": {
    "post_data": {
      "limits": [
        {
          "counter": "post_data_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 Ncp, apply this rule, and every post_data call is checked against it from then on.

FAQ

Questions about post_data

What does the post_data tool do? +

Send data to twitter-api-v2. It is categorised as a Write tool in the Ncp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on post_data? +

Register the Ncp MCP server in PolicyLayer and add a rule for post_data: 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 post_data? +

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

Can I rate-limit post_data? +

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

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

post_data 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.

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