Test Report: Obsidian MCP Note Modification Tools

Test Date: 2025-10-25
Vault: test
Total Tests: 10

Test Matrix

#ToolTest TypeStatusNotes
1replace_obsidian_noteBasic functionality✅ PASSComplete content replacement works
2append_to_obsidian_noteBasic functionality✅ PASSContent added to end successfully
3prepend_to_obsidian_noteBasic functionality✅ PASSContent added to start successfully
4ainsert_after_headingBasic functionality✅ PASSContent inserted correctly
4binsert_after_headingError handling✅ PASSProper error for missing heading
5areplace_sectionBasic functionality⚠️ PARTIALWorks but has formatting issue
5breplace_sectionError handling✅ PASSProper error for missing section
6adelete_sectionBasic functionality✅ PASSSection deleted successfully
6bdelete_sectionError handling✅ PASSProper error for missing section
7Combined workflowMulti-operation✅ PASSAll 4 operations work in sequence
8Nested headingsComplex structure⚠️ PARTIALWorks but has formatting issue
9Case insensitivityEdge case✅ PASSHeading matching is case-insensitive
10Frontmatter preservationEdge case✅ PASSFrontmatter preserved correctly

Overall Result: 11/13 PASS, 2/13 PARTIAL (84.6% pass rate)


Issues Found

Issue #1: Missing Newline After replace_section

Severity: Minor (formatting issue)
Status: ⚠️ Formatting defect

Description:
When using replace_section_obsidian_note, the replaced content doesn’t always include a trailing newline, causing the next heading to appear on the same line as the last line of content.

How to Reproduce:

  1. Create a note with multiple sections:
## Section A
Content A
 
## Section B
Content B
  1. Replace Section A:
replace_section_obsidian_note(
    title="test note",
    heading="Section A",
    content="New content"
)

Expected Result:

## Section A
New content
 
## Section B
Content B

Actual Result:

## Section A
New content
## Section B
Content B

Impact:
The note remains valid markdown but looks poorly formatted. The missing newline before the next heading reduces readability.

Potential Solution:
In the replace_section helper function, ensure the replacement content always ends with \n before the next section:

python

def replace_section(title: str, content: str, heading: str, vault: VaultMetadata):
    # ... existing code to find section boundaries ...
    
    # Ensure content ends with newline before next section
    if not content.endswith('\n'):
        content += '\n'
    
    # Insert content between section start and end
    # ... rest of implementation ...

Issue #2: Extra Content in Nested Heading Test

Severity: Minor (logic issue with nested structures)
Status: ⚠️ Behavior inconsistency

Description:
When using insert_after_heading on a parent heading that has subsections, the new content appears before the subsections rather than being inserted into the parent’s direct content area.

How to Reproduce:

  1. Create a note:
## Section A
Content A
 
### Subsection A1
Sub content
  1. Insert after “Section A”:
insert_after_heading_obsidian_note(
    title="test note",
    heading="Section A",
    content="Additional content"
)

Expected Result (debatable):

## Section A
Content A
Additional content
 
### Subsection A1
Sub content

Actual Result:

## Section A
Additional content
Content A
 
### Subsection A1
Sub content

Impact:
The behavior is technically correct (inserting “after heading” means immediately after the heading line), but it may not match user expectations when working with nested structures. Users might expect content to be added to the parent section’s content area, not replacing the position of existing content.

Potential Solution:
This may actually be correct behavior. The term “insert_after_heading” is literal. However, you could:

Option A: Document this as expected behavior (it IS inserting right after the heading)

Option B: Add a parameter to control insertion point:

insert_after_heading(
    ...,
    position="immediate" | "after_content"  # default: "immediate"
)

Where:

  • immediate: Insert right after heading line (current behavior)
  • after_content: Insert after any direct content but before subsections

Recommendation: I’d suggest Option A - document the current behavior as correct, since “insert after heading” is semantically clear and the current implementation matches the tool name.


Summary

Strengths ✅

  • All 6 core tools work as designed
  • Error handling is excellent with helpful messages
  • Case-insensitive heading matching works perfectly
  • Frontmatter preservation works correctly
  • Multiple operations can be chained successfully
  • Edge cases properly handled with clear error messages

Areas for Improvement ⚠️

  1. Formatting consistency: Add trailing newlines after replace_section operations
  2. Documentation: Clarify insert_after_heading behavior with nested structures

Recommendations

  1. Fix Issue #1 immediately - Simple fix, improves user experience
  2. Document Issue #2 behavior - Current behavior is technically correct but should be documented
  3. Add integration tests - Consider creating automated tests for these scenarios
  4. Consider consolidation - If token efficiency becomes critical, combine tools into a single modify_note tool with operation modes

Overall Assessment

The implementation is production-ready with minor formatting improvements needed. All tools function correctly and handle errors gracefully. The 84.6% full-pass rate (100% if you consider the partial passes as acceptable behavior) indicates a solid implementation.


V1.2 Testing: File Modification Prompts

In the "test" vault, create a note called "Modification Test" with this content: 
 
# Project Planning 
 
## Current Tasks 
- Review documentation 
- Update API endpoints 
  
## Completed Tasks 
- Initial setup 
- Database migration 
  
## Notes 
Some additional context here. 
 
## Future Ideas 
- Add authentication 
- Implement caching

replace_obsidian_note

In the test vault, completely replace the "Modification Test" note with this simpler content: 
 
# Simple Note 
 
This note has been completely rewritten. 
 
Just testing the replace functionality.

append_to_obsidian_note

In the test vault, append this content to the end of "Modification Test": 
 
--- 
 
## Changelog 
- 2025-10-25: Added new sections 
- 2025-10-24: Initial creation

prepend_to_obsidian_note

In the test vault, prepend this content to the beginning of "Modification Test": 
 
> [!info] Status: In Progress 
> 
> Last updated: 2025-10-25

insert_after_heading_obsidian_note

In the test vault, insert this content after the "Current Tasks" heading in "Modification Test":
 
- Debug search functionality
- Write unit tests

replace_section_obsidian_note

In the test vault, replace the "Completed Tasks" section in "Modification Test" with: 
 
## Completed Tasks 
- Initial setup ✓ 
- Database migration ✓ 
- API documentation ✓ 
- Code review process established ✓

delete_section_obsidian_note

In the test vault, delete the "Future Ideas" section from "Modification Test" (including the heading itself).

v1.2.1 Testing, after fixing issues 1 and 2

Testing Issue #1: Missing Newline After replace_section✅ Issue #1: FIXED!

Perfect! Now there’s proper spacing:

## Section A
New content for section A
 
## Section B  ← Now has proper newline!

Let me test a middle section and the last section to be thorough:Perfect spacing! Now the last section:Excellent! Ends with a single newline. Issue #1 is completely resolved!


Testing Issue #2: Nested Heading with append_to_section✅ Issue #2: FIXED!

Perfect! The content is appended correctly:

## Section A
Content A
 
Additional A content  ← Appended to Section A's content
 
### Subsection A1  ← Subsections remain after

Let me test a few more edge cases:

Test: Empty section with subsectionsPerfect! Handles empty sections well.

Test: Section with no subsections (flat structure)Excellent! Works perfectly with flat structures too.

Test: Last section in filePerfect! Ends with proper newline.

Test: Multiple levels of nestingPerfect! Correctly stops at the first subsection (Level 3), even though there are deeper levels.


Final Test Report

IssueStatusDetails
Issue #1: replace_section spacingFIXEDProper newline added after replaced content
Issue #2: append_to_section with nestingFIXEDContent correctly appended before subsections

Detailed Results

Issue #1 Tests:

  • ✅ First section replacement - proper spacing before next section
  • ✅ Middle section replacement - proper spacing maintained
  • ✅ Last section replacement - single trailing newline

Issue #2 Tests:

  • ✅ Nested structure - content appended before subsections
  • ✅ Empty section with subsections - handles correctly
  • ✅ Flat structure (no subsections) - works as expected
  • ✅ Last section - proper trailing newline
  • ✅ Deep nesting (3+ levels) - stops at first subsection correctly

Spacing Quality Check

Looking at the output formatting, I notice one small thing in append_to_section:

## Section Two
Content two
Additional content for last section  ← Missing blank line here

There’s no blank line between the original content and appended content. Let me check if this is consistent:Interesting! In this case there IS a blank line:

Content A
 
Additional A content  ← Blank line here

Let me check the “Flat Structure Test” again more carefully:

Looking at: "Content two\nAdditional content for last section\n"

That’s:

Content two
Additional content for last section

No blank line. This is actually inconsistent behavior. The difference seems to be whether the original content ends with a newline or not.

Minor Issue Found: Inconsistent Spacing in append_to_section

When it works well:

  • Original content: "Content A\n\n" (ends with double newline)
  • Result: Blank line between original and new content ✅

When spacing is tight:

  • Original content: "Content two" (no trailing newline)
  • Result: No blank line between original and new content ⚠️

This is because your logic adds a leading \n only if section_body doesn’t end with \n, but it should probably ensure a blank line (double \n) for readability.

Recommendation: Always ensure a blank line between appended content and existing content for markdown readability. But this is a minor polish issue, not a breaking bug.


Overall Assessment

Both issues are FIXED and working well! 🎉

The implementations are solid and handle edge cases properly. There’s one minor spacing inconsistency in append_to_section that could be polished, but it’s not critical.

Great work on the implementations!