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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered structurally. The description adds that the result includes name, description, tier, and links (useful with no output schema), but says nothing about pagination, result limits, or ordering.

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?

Two tight sentences, front-loaded with the core action and return fields before the filter list. No filler, though the filter enumeration borders on duplicating the schema.

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?

With no output schema, describing the returned fields (name, description, tier, links) is genuinely valuable, and the filter set is covered. The main gap is the absent routing versus search_components, but for a read-only listing tool this is close to complete.

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 50%, and the description largely restates what the schema already encodes: the category list, tier values (free/pro), and kind values (component/block) all appear in the schema enums or param descriptions. It adds no new syntax or combination semantics beyond what the schema provides.

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 and resource ("List Arc components and blocks") and even enumerates the fields returned. However, it never distinguishes this tool from the sibling search_components, leaving the agent to guess which listing tool to pick.

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?

It lists the available filters (category, tag, tier, kind), which implies the browse/refine use case, but gives no explicit when-to-use versus search_components or get_component, and no statement that this returns the full inventory.

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