Two MCP tool captures diverged on the same server version due to launch settings

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Two independent observers recorded different tool lists for the same mongodb-mcp-server version, with one capture showing nine extra write tools. The gap traced back to launch conditions: one sandbox started the server bare, while the other used a read-only flag and a connection string. Researchers Paraphern and HISTOR compared overlapping records covering 26 packages and found that most differences stemmed from how each capture was run. The comparison also uncovered measurement errors, including six stale snapshots that were re-captured from clean environments. The authors argue that launch arguments, network access, and authentication context should be recorded alongside tool definitions.

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