Change a parameter value on a module in a Cardinal/VCV Rack patch file. Specify the patch file, module ID, parameter ID, and new value (0.0 to 1.0).
Modify a parameter on a module
| Name | Required | Description | Default |
|---|---|---|---|
| value | Yes | New value (0.0 to 1.0 for most params) | |
| filepath | Yes | Path to the .vcv patch file | |
| param_id | Yes | Parameter ID | |
| module_id | Yes | Module ID to modify |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations provided, and description lacks details on side effects, permissions, or destructive potential of modifying a parameter.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Single sentence, no fluff, but may be too terse for completeness. Appropriate for a simple tool.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
No output schema, 4 required params, yet description fails to cover return behavior, error cases, or file existence constraints.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100%, so baseline 3; description adds no extra meaning beyond what schema already provides.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
Description clearly states verb (modify) and resource (parameter on module), distinguishing from sibling tools like add_module, list_modules, etc.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
No guidance on when to use this tool versus alternatives; no exclusions or prerequisites 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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