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AesirKode

enhanced-filesystem-mcp

by AesirKode

yaml_tool

Manage YAML, TOML, and JSON config files: query nested keys, set values, validate, convert, merge, and diff files with format auto-detection.

Instructions

YAML/TOML/JSON config file operations. Supports get (dot-notation query), set, delete, validate, convert between formats, merge, diff, keys, format. Auto-detects format from extension.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pathNoPath to config file
limitNoLimit number of keys shown (default: 50)
queryNoKey path using dot notation (e.g., 'database.host')
valueNoValue to set (any type)
formatNoForce input format (auto-detected by default)
indentNoIndentation level (default: 2)
outputNoOutput file path (defaults to input file)
strategyNoMerge strategy (default: deep)
compareToNoSecond file path for diff operation
mergeWithNoObject to merge (inline)
operationYesYAML/TOML operation to perform
outputFormatNoOutput format for convert operation
mergeWithFileNoPath to file to merge with
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It adds useful context such as dot-notation queries and auto-detection of format from extension, but it fails to disclose side effects for mutating operations like set/delete/merge, whether changes persist to files, return value shape, or error behavior. This is a notable transparency gap for a tool with write-capable operations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise and front-loaded, using three short sentences to communicate the tool's domain, operations, and a key behavior. Some redundancy exists because the operation list mirrors the schema enum, but the overall structure is efficient and readable.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's complexity—13 parameters, 9 operations, no output schema, and no annotations—the description is too high-level. It does not explain output formatting, file-writing side effects, or operation-specific parameter relationships such as mergeWith vs. mergeWithFile, leaving substantial gaps for an agent to correctly invoke the tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so each parameter is already well-documented in the input schema. The description does not meaningfully add parameter semantics beyond repeating dot-notation queries and format auto-detection, which are already present in the schema descriptions.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly identifies the tool as performing YAML/TOML/JSON config file operations and lists supported operations such as get, set, delete, validate, convert, merge, diff, keys, and format. It is specific about the resource domain and operation types, though it lacks a single strong verb and does not explicitly distinguish itself from sibling tools like json_tool.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies usage via 'config file operations' and the supported formats, giving a general sense of when to invoke it. However, it offers no explicit guidance on when to prefer yaml_tool over alternatives such as json_tool or efs_edit, and no exclusions or alternative scenarios are mentioned.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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