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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds useful scope (all components, filterable by category) and field coverage, but does not add behavioral details such as pagination, ordering, or response size.

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 a single efficient sentence with the core purpose front-loaded and the filter details following. The long category list is justified because the schema does not provide enums, though it makes the description slightly dense.

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 read-only list tool with one optional parameter, a rich output schema, and strong annotations, the description covers the key behavior and valid input values. It is not fully complete only because it does not address routing versus sibling tools.

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 category description is minimal ('Only this category'), while the description adds a concrete list of accepted category values. This materially helps an agent choose a valid category and understand what filtering means.

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 tool lists every catalogue component with specific fields (name, title, description, category, aliases) and supports category filtering. This is a clear verb+resource definition, but it does not explicitly distinguish itself from sibling tools like search_components or get_component.

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 the tool is for browsing the full catalogue or filtering by category, giving clear context. However, it provides no guidance on when to use this instead of search_components for text-based lookups or get_component for a single item.

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