histogram_create

Create a histogram from numeric data with configurable bins and ASCII visualization.

SERVERUnClick SOURCE@unclick/mcp-server

Medium RISK CLASS

Category Write

Parameters 21 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-malamutemayhem-unclick-mcp-server/histogram-create.md

WHAT IT DOES

What histogram_create does on UnClick

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

Parameter	Type	Required	Description
`bins`	number	—	Number of bins (default 10).
`values`	array	Yes	Array of numbers to histogram.

Parameters from the server's own tool schema.

RISK

Why histogram_create is rated Medium

This tool creates a new histogram visualization object, which is a reversible write operation. It takes numeric input data and produces a formatted output (ASCII visualization), with no side effects on external systems, no code execution, and no data deletion.

From the tool's definition Tool name 'histogram_create' and description 'Create a histogram from numeric data' indicate data creation/generation. The tool generates a new histogram visualization artifact from input data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs histogram_create safely

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

histogram_create Rate-limited

histogram_create 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": {
    "histogram_create": {
      "limits": [
        {
          "counter": "histogram_create_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 UnClick, apply this rule, and every histogram_create call is checked against it from then on.

FAQ

Questions about histogram_create

What does the histogram_create tool do? +

Create a histogram from numeric data with configurable bins and ASCII visualization. It is categorised as a Write tool in the UnClick MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does histogram_create accept? +

histogram_create accepts 2 parameters: bins, values. Required: values. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on histogram_create? +

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

What risk level is histogram_create? +

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

Can I rate-limit histogram_create? +

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

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

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

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