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

With no annotations, the description fully bears the burden. It accurately indicates a read operation (list) and specifies the output (title and one-line description). However, it does not mention error behavior for invalid categories or result limits, but for a simple list this is adequate.

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?

A single, front-loaded sentence that efficiently communicates purpose and optional filtering. No extraneous words.

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?

Given the simplicity of the tool (1 optional param, no output schema, no annotations), the description covers the essential aspects: what it lists, what it returns, and the filtering option. It could mention that the list is exhaustive or note the absence of pagination, but overall it is complete enough.

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 adds that the 'category' parameter is used for optional filtering, but provides no details on possible values, format, or behavior (e.g., case sensitivity). This is minimal and insufficient for an agent to use the parameter correctly.

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 clearly states the verb 'List' and the resource 'every BlatUI component' with explicit output (title and one-line description). It distinguishes from siblings like get_component (single component) and search_registry (narrower search).

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 implies use when you need a full list of components, optionally filtered by category, but does not explicitly state when to use this vs. alternatives like search_registry or get_component. No exclusions or conditions are mentioned.

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