Add friendly name for pdf-utilities.pdf tool

[Copilot]

pdf-utilities.pdf was appearing as "Unknown" in the UI due to a missing entry in src/toolNames.json.

Changes

• src/toolNames.json: Added mapping "pdf-utilities.pdf" → "PDF Utilities: PDF"

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add missing friendly names for tools</issue_title>
<issue_description>## Unknown Tools Found

The following tools were detected but don't have friendly display names:

• pdf-utilities.pdf

Please add friendly names for these tools to improve the user experience.</issue_description>

Comments on the Issue (you are @copilot in this section)

Custom agent used: Tool Names - Add Missing Friendly Names
Add friendly display names for unknown MCP and VS Code tools detected in session logs. Handles tool name mapping in src/toolNames.json.

• Fixes Add missing friendly names for tools #421

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