MCP tweaks (token case)

src/core/builder/proposal_generator.py

@@ -47,6 +47,8 @@ Requirements:
 3. The function return type MUST be specified (e.g. `-> str`).
 4. The function name should match '{project_name}' (normalized to python snake_case).
 5. If the code requires external libraries (like `requests`, `pandas`, `numpy`), list them.
+6. If the function calls an external API that needs a token, handle the token as an argument and precise it in the docstring.
+
 
 Return ONLY a valid JSON object with the following structure:
 {{