Return a JSON example
AI agents call return_json_example to retrieve information from Simple MCP Server with Streamable HTTP Example without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool returns a static JSON example, which is a read/fetch operation with no side effects. It appears to simply provide a sample JSON structure, posing minimal risk if misused.
From the tool's definition Return a JSON example
Attacks that exploit this kind of access
Return a JSON example. It is categorised as a Read tool in the Simple MCP Server with Streamable HTTP Example MCP Server, which means it retrieves data without modifying state.
Register the Simple MCP Server with Streamable HTTP Example MCP server in PolicyLayer and add a rule for return_json_example: 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 Simple MCP Server with Streamable HTTP Example. Nothing to install.
return_json_example 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 return_json_example 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 return_json_example. 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.
return_json_example is provided by the Simple MCP Server with Streamable HTTP Example MCP server (jonigl/mcp-server-with-streamable-http-example). 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.
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