This record as markdown: /tools/io-tinyfn-tinyfn/hex-to-rgb.md
What hex_to_rgb does on TinyFn
AI agents call hex_to_rgb 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 (e.g., #FF5733 or FF5733) |
Parameters from the server's own tool schema.
Why hex_to_rgb is rated Low
This is a pure computational utility for color space conversion. It takes a hex color string as input and outputs RGB values. No external systems are affected, no data is persisted or deleted, and the operation is deterministic and reversible. It fits the Read category as a data retrieval/transformation tool with minimal security risk.
From the tool's definition Tool performs a color format conversion (hex to RGB) with no side effects. The description explicitly states 'Convert hex color to RGB', which is a simple data transformation.
Attacks that exploit this kind of access
The rule that runs hex_to_rgb 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 hex_to_rgb, this is the rule to start with:
hex_to_rgb is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect TinyFn, apply this rule, and every hex_to_rgb call is checked against it from then on.
Questions about hex_to_rgb
Convert hex color to RGB. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
hex_to_rgb accepts 1 parameter: hex_color. Required: hex_color. The full parameter table on this page comes from the server's own tool schema.
Register the TinyFn MCP server in PolicyLayer and add a rule for hex_to_rgb: 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.
hex_to_rgb is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the hex_to_rgb 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.
Set action: deny in the PolicyLayer policy for hex_to_rgb. 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.
hex_to_rgb 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.
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