fix(pydantic-ai): Stop capturing tool execution spans when validation fails

[alexander-alderman-webb]

Description

Do not capture a tool execution span when the tool doesn't execute because the arguments are invalid.

The tool is never executed when validation fails, as ToolHandler short circuits by raising an exception in this case. See https://github.com/pydantic/pydantic-ai/blob/0ec8a5dcc9c30e82e91d63af20e5d92f1456fac5/pydantic_ai_slim/pydantic_ai/tool_manager.py#L977

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 📊

✅ 131905 passed | ⏭️ 7131 skipped | Total: 139036 | Pass Rate: 94.87% | Execution Time: 482m 21s

📊 Comparison with Base Branch

Metric	Change
Total Tests	—
Passed Tests	—
Failed Tests	—
Skipped Tests	—

✨ No test changes detected

All tests are passing successfully.

✅ Patch coverage is 100.00%. Project has 2520 uncovered lines.
✅ Project coverage is 90.23%. Comparing base (7e95b86) to head (1fc035d).

Files with missing lines (1)

File	Patch %	Lines
sentry_sdk/integrations/pydantic_ai/patches/tools.py	100.00%	⚠️ 1 partials

Coverage diff

@@            Coverage Diff             @@
##        master       #PR       +/-##
==========================================
+ Coverage    90.20%    90.23%    +0.03%
==========================================
  Files          193       193         —
  Lines        25788     25790        +2
  Branches      9530      9532        +2
==========================================
+ Hits         23261     23270        +9
- Misses        2527      2520        -7
- Partials      1432      1433        +1

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