Single tool 'obsidian_read' has a well-formed input schema with proper type constraints (string, minLength 1, maxLength 1024) and clear parameter description. However, the tool description is minimal (58 chars) and lacks critical context about what the tool returns, when to use it, error conditions, and whether it's safe to retry. No output schema is documented. The tool name lacks a clear action verb prefix (should be 'read_obsidian_note' or similar). No error handling guidance provided. Baseline: A+ tools average 194 chars for descriptions and 100% document return types; this tool meets neither.

• Expand tool description to 150-250 chars. Include: (1) What it does: 'Reads the full text content of a note file from the selected Obsidian vault.' (2) When to use it: 'Call this to retrieve note content by relative path.' (3) What it returns: 'The complete note text as a string.' (4) Error guidance: 'If the path does not exist, returns a 404 error, verify the path and try again.'
• Document the output schema explicitly. Example: { type: 'object', properties: { content: { type: 'string', description: 'Full text content of the note file' }, path: { type: 'string', description: 'The requested relative path' }, size_bytes: { type: 'integer', description: 'File size in bytes' } } }
• Rename tool to 'read_obsidian_note' to follow verb_noun convention and make the action immediately clear to LLMs.
• Add parameter format guidance: 'Relative path using forward slashes (e.g., "folder/subfolder/note.md"). Must be within the vault root; paths with ".." are rejected.'
• Add error handling examples in the tool description: 'Returns error if path contains ".." (security), if file does not exist (404), or if vault is not accessible (500). All errors are retryable except 404 with invalid path syntax.'