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Claude Desktop tool execution fails due to internal server error

By PulseAugur Editorial · [1 sources] ·

A user encountered a persistent issue where all 26 tools offered by the GitHub MCP server failed to execute within the Claude Desktop application. Despite initial troubleshooting steps, including re-authorizing the GitHub App and testing with a public repository, the error "Tool execution failed" persisted. Closer examination of the application logs revealed that the calls were reaching the server, which responded with a JSON-RPC 2.0 error code -32603, indicating an internal error, rather than a client-side token problem as initially suspected. AI

IMPACT Troubleshooting reveals a bug in Claude Desktop's integration with GitHub tools, impacting user experience.

RANK_REASON User-reported issue with a specific software product's functionality.

Read on dev.to — MCP tag →

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

Claude Desktop tool execution fails due to internal server error

How we ranked this

Signal score
0 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
User-reported issue with a specific software product's functionality.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, other
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
12 days old
Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.

Full methodology in our editorial standards.

COVERAGE [1]

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

    All 26 of My MCP Tools Failed the Same Way. My Test to Rule Out the Token Proved It Was the Problem.

    <p>Every tool the GitHub MCP server offered was sitting right there in the list — all 26 were recognized correctly. Call any one of them and it failed in under 1 second, every time, with one line on screen: <code>Tool execution failed</code>. No reason attached. Even reading a fu…

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