rot13_cipher
Apply ROT13 or custom ROT-N cipher (letter rotation).
This record as markdown: /tools/io-github-scotia1973-bot-api-hub/rot13-cipher.md
What rot13_cipher does on GadgetHumans API Hub
AI agents call rot13_cipher to retrieve information from GadgetHumans API Hub without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why rot13_cipher is rated Low
ROT13/ROT-N ciphers are deterministic text transformations that encode/decode strings without creating, modifying, deleting, or executing operations. The tool merely computes and returns a transformed string. This is a stateless read-like operation (input → output mapping) with no persistent side effects, placing it in the Read category despite being a transformation utility rather than a retrieval operation.
From the tool's definition Tool applies ROT13 or custom ROT-N cipher, which are letter rotation transformations. The description indicates it 'applies' a cipher—a reversible encoding operation with no data mutation, deletion, or execution of arbitrary code.
Attacks that exploit this kind of access
The rule that runs rot13_cipher safely
PolicyLayer is an MCP gateway: it sits between your AI agents and GadgetHumans API Hub, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For rot13_cipher, this is the rule to start with:
rot13_cipher 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 GadgetHumans API Hub, apply this rule, and every rot13_cipher call is checked against it from then on.
Questions about rot13_cipher
Apply ROT13 or custom ROT-N cipher (letter rotation). It is categorised as a Read tool in the GadgetHumans API Hub MCP Server, which means it retrieves data without modifying state.
Register the GadgetHumans API Hub MCP server in PolicyLayer and add a rule for rot13_cipher: 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 GadgetHumans API Hub. Nothing to install.
rot13_cipher 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 rot13_cipher 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 rot13_cipher. 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.
rot13_cipher is provided by the GadgetHumans API Hub MCP server (pypi:gadgethumans-api-hub-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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