This record as markdown: /tools/io-tinyfn-tinyfn/uppercase.md
What uppercase does on TinyFn
AI agents call uppercase 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 |
|---|---|---|---|
text | string | Yes | The text to uppercase |
Parameters from the server's own tool schema.
Why uppercase is rated Low
This is a pure deterministic function that transforms input strings to uppercase. It has no capability to retrieve sensitive data, modify persistent state, execute code, delete data, or commit financial operations. The transformation is reversible and operates only on the provided input.
From the tool's definition Tool name 'uppercase' and description 'Convert text to uppercase' indicate a simple text transformation utility that reads input and returns modified output with no side effects, no data persistence, and no external operations.
Attacks that exploit this kind of access
The rule that runs uppercase 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 uppercase, this is the rule to start with:
uppercase 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 uppercase call is checked against it from then on.
Questions about uppercase
Convert text to uppercase. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
uppercase accepts 1 parameter: text. Required: text. 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 uppercase: 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.
uppercase 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 uppercase 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 uppercase. 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.
uppercase 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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