complement_color
Get the complementary color (opposite on color wheel).
This record as markdown: /tools/io-tinyfn-tinyfn/complement-color.md
What complement_color does on TinyFn
AI agents call complement_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 get complement of |
Parameters from the server's own tool schema.
Why complement_color is rated Low
This is a deterministic mathematical/computational tool that retrieves calculated data with no side effects. It fits the Read category: it queries/computes a result without creating, modifying, or deleting any persisted state. The severity is low because even if misused by an AI agent, the worst outcome is incorrect color values returned to the user, with no security, financial, or operational impact.
From the tool's definition Tool is named 'complement_color' and described as 'Get the complementary color (opposite on color wheel)'. This is a query operation that computes and returns a derived value (complementary color) without modifying any data or triggering external operations.
Attacks that exploit this kind of access
The rule that runs complement_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 complement_color, this is the rule to start with:
complement_color 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 complement_color call is checked against it from then on.
Questions about complement_color
Get the complementary color (opposite on color wheel). It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
complement_color 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 complement_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.
complement_color 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 complement_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.
Set action: deny in the PolicyLayer policy for complement_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.
complement_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.
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