docs: More tool docs to clarify tool addition

[tianjing-li]

Thank you for contributing to the Cohere Toolkit!

• PR title: "area: description"

  • Where "area" is whichever of interface, frontend, model, tools, backend, etc. is being modified. Use "docs: ..." for purely docs changes, "infra: ..." for CI changes.
  • Example: "deployment: add Azure model option"

• PR message: Delete this entire checklist and replace with

  • Description: a description of the change
  • Issue: the issue # it fixes, if applicable
  • Dependencies: any dependencies required for this change

• Add tests and docs: Please include testing and documentation for your changes

• Lint and test: Run make lint and make run-tests

AI Description

Generating pr description

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.91%. Comparing base (0a9af1d) to head (23509de).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #886   +/-   ##
=======================================
  Coverage   77.91%   77.91%           
=======================================
  Files         259      259           
  Lines       11150    11150           
=======================================
  Hits         8688     8688           
  Misses       2462     2462           

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