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New probe reveals three server responses to non-existent tool requests

By PulseAugur Editorial · [1 sources] ·

A new tool called mcp-era-probe has been released to test how servers handle requests for non-existent tools. The probe, which does not interact with actual tools, sends requests for impossible tool names to various servers. Analysis of eleven targets revealed three distinct ways servers respond: through standard JSON-RPC protocol errors, execution errors within a successful response, or a seemingly successful response that contains the error message as text. AI

IMPACT This tool helps developers understand and standardize how AI model servers handle errors, potentially improving reliability and interoperability.

RANK_REASON The item describes a new tool release and its functionality.

Read on dev.to — MCP tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

New probe reveals three server responses to non-existent tool requests

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3 / 100
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COVERAGE [1]

  1. dev.to — MCP tag TIER_1 English(EN) · Pennyforge ·

    I asked MCP servers for a tool that doesn't exist. I got three kinds of answer.

    <p>Earlier today I published <a href="https://github.com/m0nk111-qwen-agent/mcp-era-probe" rel="noopener noreferrer">mcp-era-probe</a>, a read-only instrument for checking which version of the Model Context Protocol a server actually speaks. Today I shipped v0.8 of it, and the ne…

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