AI agents call dad_joke to retrieve information from TinyFn without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves data (a random joke) without creating, modifying, deleting, executing code, or involving financial operations. It is a simple read operation with no ability to affect system state or user data. Severity is low as misuse would only result in retrieving unwanted joke content with no harmful consequences.
From the tool's definition Tool name 'dad_joke' with description 'Get a random dad joke' indicates a retrieval operation with no side effects. The verb 'Get' and the nature of fetching random joke content aligns with read-only data retrieval.
Attacks that exploit this kind of access
Get a random dad joke. It is categorised as a Read tool in the TinyFn MCP Server, which means it retrieves data without modifying state.
Register the TinyFn MCP server in PolicyLayer and add a rule for dad_joke: 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.
dad_joke 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 dad_joke 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 dad_joke. 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.
dad_joke 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.
dad_joke is one line of TinyFn's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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