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

No annotations are provided, so the description carries the burden. It accurately describes the output fields and filter options, which is sufficient for a read-only list operation. It does not explicitly state read-only, but 'list' implies a safe read, and there are no destructive behaviors to disclose.

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 covering the resource, returned fields, and filter options. Every word earns its place with no redundancy.

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 no output schema, the description adequately explains what the tool returns (fields) and how filters work. The array structure is implied by 'list', and the optionality is clear. Minor gap is not specifying how filters combine (AND/OR), but this is a simple tool.

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 properties have no descriptions, but the description explicitly identifies both 'category' and 'tag' as optional filters. This adds meaningful semantics beyond the bare schema, explaining how the parameters are used.

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 the action 'List' with resource 'skills' and specifies the returned fields (slug, category, title, tags). It also mentions optional filters, distinguishing it from siblings like get_skill (single skill) and suggest_skills (recommendations).

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 context is clear: use this to list all skills or apply category/tag filters. No explicit alternatives are mentioned, but for a simple list tool, the use case is obvious. Lacks a direct 'when not to use' but not necessary given the straightforward purpose.

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