open_ui

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

With no annotations, the description carries the full behavioral burden. It indicates the output is a URL and is therefore non-mutating, but it does not disclose whether the tool opens a browser, returns a string, requires authentication, or what happens with the optional view 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?

The one-sentence description is dense but well organized, front-loading the core resource and grouping features under Explore and Lake. Some feature enumeration is arguably extra, but it is useful for disambiguation and not redundant.

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 zero-required-parameter tool, the description gives a useful overview of the target UI and implies the output is a URL. It is incomplete on the allowed values of the view parameter and does not specify the return format, but the minimal surface area limits the damage.

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?

The schema's view parameter has 0% description coverage, but the description names two UI areas, Explore and Lake, which are the likely values. It never explicitly maps view='explore' or view='lake' to the parameter, so the agent must infer the mapping.

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 identifies the tool's resource as the unified UI URL and enumerates the two major views, Explore and Lake, which separates it from the sibling ui_* tools that target single pages. However, it uses a noun phrase ('URL of...') rather than an explicit action verb, so the exact tool behavior is slightly implied by the name.

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 statement tells an agent when to choose open_ui over sibling tools such as ui_scenes or ui_lake_summary. The term 'unified UI' weakly implies an all-in-one entry point, but there is no explicit when-to-use or when-not-to-use guidance.

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