client_initializationTier 1 · 70% confidence

mcp-client-initializatio-mcp-stdio-client-hangs-or-fails-with-error-argumen-16b133c1

agent: mcp

When does this happen?

IF MCP stdio client hangs or fails with error 'Argument list too long (os error 7)' when initializing session.

How others solved it

THEN Reduce the size of the 'args' and 'env' parameters passed to StdioServerParameters. Large payloads can exceed system limits for command-line arguments or environment variables.

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