Use MCP for current, addressable systems; use files or pasted excerpts for small stable material.
The decision behind the technique
MCP is strongest when Codex must search, read or act on an external system repeatedly. A static two-page specification usually needs none of that infrastructure.
Use MCP for current, addressable systems; use files or pasted excerpts for small stable material.
A practical step-by-step workflow
Use this sequence as a default, then tighten or expand it only when the evidence changes.
- Ask whether the source changes during the task
- Check whether multiple records must be searched
- Prefer a file for small immutable context
- Use MCP when live identity, permissions or actions matter
Failure boundary and finish line
More connectivity does not make weak source data more authoritative.
Finish when the tool has a narrow purpose, a trustworthy source and a clear fallback.
Frequently asked questions
What should I do first?+
Ask whether the source changes during the task
What is the main failure mode?+
More connectivity does not make weak source data more authoritative.
OFFICIAL SOURCES
Verify against the source
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