create_modulation_parameter

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

Annotations only declare the generic write profile (readOnlyHint=false, destructiveHint=false, openWorldHint=false), so the description's disclosure that an existing asset at the path is returned untouched with its real class and is NOT saved is genuinely additive, as is the created/already_existed/saved return contract. The one caveat is that this create-if-absent behavior reads as idempotent while idempotentHint is false; the description doesn't resolve that tension, which keeps it from a 5.

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?

The create/existing/return facts are front-loaded well, but the return field list is stated twice: once inline ('Returns parameter_path, parameter_name, ...') and again as a trailing 'Returns: { ... }' line. That duplication wastes space without adding information.

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?

There is no output schema, so the description correctly enumerates the returned fields, covers the already-exists branch, and names the tuning follow-up. Minor gaps remain, such as whether the containing directory must already exist and what happens if the path is invalid, but nothing critical for a correct invocation is missing.

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 description coverage is 100% and the parameter_class description already enumerates every concrete class and engine spelling, so the schema carries the parameter burden. The description adds only that the class must be 'concrete' and that the path's leaf becomes the asset name is left to the schema, so baseline 3 applies.

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?

The description states a specific verb (creates), a precise resource (a USoundModulationParameter asset of the chosen concrete class), and the destination (parameter_path), plus that it is saved. It also points to the sibling tool used for follow-up tuning, so an agent can place it among create_modulation_generator / get_modulation_parameter_info without opening a schema.

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?

It gives a clear next-step route ('Tune it with set_modulation_parameter_settings') but never states when this tool should be chosen over alternatives, nor any precondition (e.g. that you need a modulation parameter asset before building a patch). Usage is implied by the create semantics rather than spelled out.

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