Operating rules

Use scripts/rest_request.py for all ChEMBL API calls.
Use base_url=https://www.ebi.ac.uk/chembl/api/data.
The script accepts max_items; for activity, mechanism, and text-search collections, start with API limit=10 and max_items=10.
Single molecule or target lookups usually do not need max_items.
Re-run requests in long conversations instead of relying on older tool output.
Treat displayed ... in tool previews as UI truncation, not literal request content.

Execution behavior

Return concise markdown summaries from the script JSON by default.
Return the script JSON verbatim only if the user explicitly asks for machine-readable output.
Prefer these paths: activity.json, molecule/<id>.json, target/<id>.json, mechanism.json, and molecule/search.json.
Use record_path to target list fields like activities, mechanisms, or molecules.