fixes tool name

[ldjebran]

Tool Definition is using tool_name instead of name.
https://github.com/llamastack/llama-stack/blob/e710622d4c03c8a4549a93f70c993f22d0676910/src/llama_stack/models/llama/datatypes.py#L85

https://github.com/llamastack/llama-stack/blob/release-0.2.22/llama_stack/providers/inline/agents/meta_reference/agent_instance.py#L793

Description

Type of change

• Refactor
• New feature
• Bug fix
• CVE fix
• Optimization
• Documentation Update
• Configuration Update
• Bump-up service version
• Bump-up dependent library
• Bump-up library or tool used for development (does not change the final image)
• CI configuration change
• Unit tests improvement

Tools used to create PR

Identify any AI code assistants used in this PR (for transparency and review context)

• Assisted-by: (e.g., Claude, CodeRabbit, Ollama, etc., N/A if not used)
• Generated by: (e.g., tool name and version; N/A if not used)

Related Tickets & Documents

• Related Issue #
• Closes #

Checklist before requesting a review

• I have performed a self-review of my code.
• PR has passed all pre-merge test jobs.
• If it is a core feature, I have added thorough tests.

Testing

• Please provide detailed steps to perform tests related to this code change.
• How were the fix/results from this change verified? Please provide relevant screenshots or results.

[acosferreira]

lgtm

[ldjebran]

fixed unitest