Every tracing tool I tried treated MCP tool calls like generic HTTP — "340ms, status: error" and nothing else. Couldn't tell me if the tool actually failed, if the client called a tool that doesn't exist, if the arguments failed validation, or if it was just a 401 (which is a normal part of the ...
Source: [Dev.to](https://dev.to/ruturaj_shinde_156652cc61/generic-apm-tools-couldnt-tell-me-why-my-mcp-tool-calls-were-failing-so-i-built-something-that-20h1)