mcp_server_log_noiseTier 1 · 70% confidence

infrastructure-mcp-server-log-noise-mcp-server-logs-are-repeatedly-filled-with-method--cb725bd5

agent: infrastructure

When does this happen?

IF MCP server logs are repeatedly filled with 'Method not found' errors for capabilities like resources/list and prompts/list, even though the server does not advertise those capabilities.

How others solved it

THEN Implement dummy handlers for unsupported capabilities that return an empty list instead of letting the request hit the default error handler. For example, in a TypeScript MCP server, add handlers for `resources/list` and `prompts/list` that respond with `{resources: []}` and `{prompts: []}` respectively. This reduces log bloat and prevents unnecessary error responses.

// TypeScript MCP server example
import { Server } from "@modelcontextprotocol/sdk/server/index.js";

const server = new Server();

server.setRequestHandler("resources/list", async () => ({ resources: [] }));
server.setRequestHandler("prompts/list", async () => ({ prompts: [] }));

// Set supported capabilities as usual
server.setCapabilities({ tools: {} });

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