invert_color

Invert a color.

SERVERTinyFn SOURCEhttps://api.tinyfn.io/mcp/all/

Low RISK CLASS

Category Read

Parameters 11 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-tinyfn-tinyfn/invert-color.md

WHAT IT DOES

What invert_color does on TinyFn

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

Parameter	Type	Required	Description
`hex_color`	string	Yes	Hex color to invert

Parameters from the server's own tool schema.

RISK

Why invert_color is rated Low

This tool retrieves/computes a transformed color value based on input parameters. It does not create, modify, delete, or execute arbitrary code. It is part of a suite of deterministic utility functions (math, conversion, validation) as described in the server description. The operation is read-only in nature—it takes color input and returns a computed result without altering any state or data.

From the tool's definition Tool name is 'invert_color' with description 'Invert a color.' This is a color transformation utility that computes an inverted color value from input color data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs invert_color safely

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

invert_color Allowed

invert_color 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": {
    "invert_color": {}
  }
}

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

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

FAQ

Questions about invert_color

What does the invert_color tool do? +

Invert a color. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.

What parameters does invert_color accept? +

invert_color accepts 1 parameter: hex_color. Required: hex_color. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on invert_color? +

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

What risk level is invert_color? +

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

Can I rate-limit invert_color? +

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

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

invert_color is provided by the TinyFn MCP server (https://api.tinyfn.io/mcp/all/). 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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