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

Annotations already indicate a read-only, idempotent operation, so the description does not need to restate safety. It adds no behavior beyond returning all matching components and does not mention pagination, ordering, or response size, but the low complexity and readOnlyHint make these gaps less critical.

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 compact, front-loaded with the tool's core purpose, and adds the essential filter vocabulary without extraneous detail. Every sentence contributes useful 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?

For a low-complexity read-only listing tool with one optional parameter and no output schema, the description gives enough to call it correctly: it specifies what is returned)Skip? it specifies returned fieldsLEY and enumerates valid categories. It does not discuss pagination or result limits, but the nature of the operation makes that a minor gap.

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 already describes category as 'Only this category', and the description adds the complete set of valid category values, which is genuinely useful since the schema has no enum list. This goes beyond what the schema alone provides, though not by a large margin.

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 uses a specific verb ('List'), identifies the resource ('components in the catalogue'), and names the returned fields (name, title, description, category, aliases). It does not explicitly contrast against sibling tools like get_component or search_components, but 'Every component' plus 'Filter by category' conveys the list-all scope clearly.

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 explains the optional category filter and lists valid category values, which gives clear usage context. However, it does not explicitly say when to prefer this tool over list_component or search_components, so an agent gets no direct sibling differentiation.

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