Get a random programming joke for testing the server connection
AI agents call get_joke to retrieve information from Shell Executor MCP Server 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) and performs no modifications, deletions, or external operations. It is purely informational and used for testing connectivity. This is a low-risk Read operation.
From the tool's definition Tool name 'get_joke' and description 'Get a random programming joke for testing the server connection' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
Get a random programming joke for testing the server connection. It is categorised as a Read tool in the Shell Executor MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Shell Executor MCP Server MCP server in PolicyLayer and add a rule for get_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 Shell Executor MCP Server. Nothing to install.
get_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 get_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 get_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.
get_joke is provided by the Shell Executor MCP Server MCP server (kosiew/zmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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