list_registered_apis
AI agents call list_registered_apis to retrieve information from Ultimate-MCP-Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool name suggests it lists or retrieves data about registered APIs without modifying, executing, or deleting anything. No description is provided, which reduces confidence slightly, but the naming convention strongly indicates a read-only operation. The context of agent orchestration and token optimization suggests this is a utility to query available API integrations rather than invoke them.
From the tool's definition Tool name 'list_registered_apis' indicates a query/listing operation that retrieves information about registered APIs.
Attacks that exploit this kind of access
list_registered_apis. It is categorised as a Read tool in the Ultimate-MCP-Server MCP Server, which means it retrieves data without modifying state.
Register the Ultimate-MCP-Server MCP server in PolicyLayer and add a rule for list_registered_apis: 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 Ultimate-MCP-Server. Nothing to install.
list_registered_apis 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 list_registered_apis 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 list_registered_apis. 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.
list_registered_apis is provided by the Ultimate-MCP-Server MCP server (logos-parthenos-ai/ultimate_mcp_server). 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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