Lists all configured APIs from apis.yaml. Use this to see available API names that can be used with other tools.
AI agents call listApis to retrieve information from Swagger MCP (Multi-API Edition) without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and enumerates API configuration metadata from a configuration file. It performs a read-only operation that does not create, modify, delete, or execute any external operations. The low severity reflects minimal blast radius—an agent listing available APIs poses no risk of unintended data modification, deletion, or external action.
From the tool's definition Tool description states 'Lists all configured APIs from apis.yaml', which is a retrieval/query operation with no side effects.
Attacks that exploit this kind of access
Lists all configured APIs from apis.yaml. Use this to see available API names that can be used with other tools. It is categorised as a Read tool in the Swagger MCP (Multi-API Edition) MCP Server, which means it retrieves data without modifying state.
Register the Swagger MCP (Multi-API Edition) MCP server in PolicyLayer and add a rule for listApis: 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 Swagger MCP (Multi-API Edition). Nothing to install.
listApis 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 listApis 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 listApis. 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.
listApis is provided by the Swagger MCP (Multi-API Edition) MCP server (psh4607/swagger-muti-mcp). 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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