fix(mcp): Stop adding the prompt name to arguments

[alexander-alderman-webb]

Description

The prompt name is already recorded under the mcp.prompt.name attribute.

Issues

Reminders

• Please add tests to validate your changes, and lint your code using uv run ruff.
• Add GH Issue ID & Linear ID (if applicable)
• PR title should use conventional commit style (feat:, fix:, ref:, meta:)
• For external contributors: CONTRIBUTING.md, Sentry SDK development docs, Discord community

[github-actions]

Codecov Results 📊

✅ 98741 passed | ⏭️ 6806 skipped | Total: 105547 | Pass Rate: 93.55% | Execution Time: 358m 49s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📈 +11
Passed Tests	📈 +14
Failed Tests	📉 -3
Skipped Tests	—

➖ Removed Tests (1)

View removed tests

• test_circular_references_span_streaming
  • File: tests.tracing.test_misc

All tests are passing successfully.

✅ Patch coverage is 100.00%. Project has 2559 uncovered lines.
✅ Project coverage is 89.56%. Comparing base (base) to head (head).

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
+ Coverage    89.55%    89.56%    +0.01%
==========================================
  Files          193       193         —
  Lines        24520     24518        -2
  Branches      8676      8676         —
==========================================
+ Hits         21958     21959        +1
- Misses        2562      2559        -3
- Partials      1402      1400        -2

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Generated by Codecov Action

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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