Fix update_component tool to surface errors when updates fail

[wojciech-golowkow]

Summary

The update_component tool used to return a success state even when it silently failed to persist changes to one or more component fields.
This pull request changes that behaviour: whenever any field update fails, the tool now returns an error state with a clear reason, so agents immediately know that their changes were not applied.

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Problem

• Agents were misled by a success response, assuming their updates were saved.
• The silent failure caused inconsistent component data and wasted debugging time.

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Solution

• Error propagation – If any write operation on a component field fails, the tool now:
  1. Stops further updates.
  2. Returns status: "error" and a descriptive message detailing which field(s) failed and why.

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🔧 This PR fixes the update_component tool to properly surface errors when component field updates fail, replacing silent failures with clear error messages. Previously, the tool would return success even when field updates failed, misleading agents about the actual state of their changes.

🔍 Detailed Analysis

Key Changes

• Error Handling: Modified UpdateComponentData method to return success/failure status with detailed error messages via an out parameter
• Response Logic: Updated main execution flow to check update results and return appropriate error responses when field updates fail
• State Management: Reorganized dirty marking and prefab recording to only occur after successful updates
• Validation: Added null/empty field name validation to prevent processing invalid data

Technical Implementation

flowchart TD
    A[Execute update_component] --> B{Component exists?}
    B -->|No| C[Add component + mark dirty]
    B -->|Yes| D[Use existing component]
    C --> E{Has component data?}
    D --> E
    E -->|Yes| F[UpdateComponentData]
    E -->|No| G[Return success]
    F --> H{Update successful?}
    H -->|No| I{Was component added?}
    H -->|Yes| J[Mark dirty + record prefab]
    I -->|Yes| K[Return partial success error]
    I -->|No| L[Return update error]
    J --> G

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Impact

• Error Transparency: Agents now receive immediate feedback when field updates fail, preventing confusion about component state
• Debugging Efficiency: Clear error messages specify which fields failed and why, reducing troubleshooting time
• Data Consistency: Prevents scenarios where agents assume changes were applied when they actually failed silently
• Partial Success Handling: Distinguishes between cases where component addition succeeded but field updates failed

Created with Palmier

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[CoderGamester]

Good improvement
Thank you @wojciech-golowkow