ui_hint

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

With no annotations available, the description carries the full burden of behavioral disclosure. 'Transient' usefully indicates the message disappears automatically, but the description omits details such as whether FL Studio must be running, what happens on failure, or how long the message stays visible.

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 description is one short sentence that fully states what the tool does and leaves no filler. Every word earns its place.

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?

For a simple one-parameter UI utility, the description covers the essential behavior. Minor gaps like maximum message length and return value exist, but they are unlikely to prevent correct invocation.

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 0%, so the description must compensate. It only mentions 'hint message', and while the sole parameter is named 'message' and somewhat self-explanatory, the description does not specify format, length limits, or any other constraints that would help an agent construct a valid value.

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 ('Display'), a specific resource (FL Studio's status bar), and a modifier ('transient hint message') that sets it apart from other UI-focused tools like ui_show_window or ui_focused_window. An agent can immediately understand the tool's function without ambiguity.

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?

The description does not explicitly say when to use this tool versus alternatives, but its purpose is self-evident and no sibling provides the same function. Usage context is implied by the description rather than explicitly spelled out.

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