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Fannon

u-he-preset-randomizer-mcp

filter_presets

Filter presets by category hierarchy, author name, favorites file, or glob pattern after selecting a synth.

Instructions

Filter presets by specific criteria including category (hierarchical), author, favorites file, or glob pattern. Can combine multiple filters. Requires a synth to be selected first.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
authorNoFilter by preset author/creator name (exact match required)
patternNoGlob pattern to filter preset paths (e.g., "Bass/**/*", "*Pad*")
categoryNoFilter by category prefix (e.g., "Bass", "Bass:Sub", "Lead:Mono"). Uses hierarchical matching.
favoritesNoFilter by favorites file name (e.g., "MyFavorites.uhe-fav")
Behavior3/5

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

No annotations provided, so the description must disclose behavior. It mentions combinability and the prerequisite, but does not discuss edge cases like no results or invalid input, which would benefit an agent.

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

Conciseness5/5

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

Two concise sentences with no wasted words. Front-loaded with the action and criteria, then the prerequisite.

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

Completeness4/5

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

For a filter tool with 4 optional parameters and no output schema, the description covers the criteria, combinability, and prerequisite. Could be slightly more detailed about behavior, but generally complete.

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 coverage is 100%, so the description adds value by noting 'hierarchical matching' for category, but otherwise mirrors the schema. This is adequate but not exceptional.

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

Purpose5/5

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

The description clearly states it filters presets by specific criteria (category, author, favorites file, glob pattern) and can combine filters. It distinguishes from siblings like list_presets and search_presets by specifying the filtering mechanism.

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

Usage Guidelines4/5

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

The description explicitly requires a synth to be selected first, which is a key usage guideline. It implies use when you need to filter by these criteria, but does not explicitly exclude alternatives like search_presets.

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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