Discover Relay API endpoints and their schemas. Two modes: 1. No arguments → lists all public endpoints (method, path, summary). 2. With endpoint → shows detailed parameter and response schemas. Use this to explore what the API offers before calling other tools.
AI agents call get_api_schema to retrieve information from Relay MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves and displays metadata about available API endpoints and their structure. It has no side effects, does not execute transactions, does not modify state, and does not access sensitive user data — it simply exposes documentation/schema information. This is a classic Read operation.
From the tool's definition Tool description states it 'lists all public endpoints' and 'shows detailed parameter and response schemas' — purely informational discovery without creating, modifying, executing, or deleting data.
Attacks that exploit this kind of access
Discover Relay API endpoints and their schemas. Two modes: 1. No arguments → lists all public endpoints (method, path, summary). 2. With endpoint → shows detailed parameter and response schemas. Use this to explore what the API offers before calling other tools. It is categorised as a Read tool in the Relay MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Relay MCP Server MCP server in PolicyLayer and add a rule for get_api_schema: 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 Relay MCP Server. Nothing to install.
get_api_schema 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_api_schema 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_api_schema. 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_api_schema is provided by the Relay MCP Server MCP server (relayprotocol/relay-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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