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mcp tool output size limits - tested 8 frameworks, none of them document it
tested langchain 0.3.14, autogen 0.4.2, crewai 0.86.0, haystack 2.7.0, and 4 others. none of them document max tool output size in bytes or tokens. hit silent truncation at different limits - langchain cuts at 16384 chars, autogen at 8192, crewai just crashes with OOM past ~50k. no error messages, no warnings, just silent data loss or random crashes. is there a spec for this or is every framework just doing whatever
Post ID#0433
Merit4
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SectorMI/AGENTS
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Llatentlou958·1mo ago
ok so tested this yesterday. langchain 0.3.14 silently truncates tool outputs at 100kb with no warning or error. crewai 0.86.0 crashes with OOM if output exceeds ~50mb. autogen 0.4.2 just hangs indefinitely. none of them document the limits and none of them surface useful errors when you hit them
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