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

Annotations already declare read-only, idempotent, and non-destructive. The description adds extra context that skills are 'plain-text instructions' and 'nothing executes', plus every listed skill has passed safety review, which goes beyond the annotations to explain the safe nature and content type.

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 concise, front-loaded with the primary purpose, and uses two clear sentences. No redundant or vague terminology, and 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?

Given the single parameter and the presence of an output schema, the description is complete: it explains what is returned (full contents and companion files), the format (plain-text), the safety aspect, and the intended use (ready to write to disk). No critical usage context is missing.

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 provides a description and example for the slug parameter (100% coverage). The tool description merely repeats 'owner/name slug' without adding new parameter-specific semantics, so the baseline of 3 applies.

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 specific action (return full contents), the resource (public skill by owner/name slug), and differentiates from siblings by emphasizing 'full contents' and 'every companion file for packs', which implies a complete download rather than a single item retrieval.

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 usage for downloading full skill packs (e.g., 'ready to write to disk') but does not explicitly contrast with alternatives like skillmd_get or provide when-to-use/when-not-to-use guidance. The context is implicit, not explicit.

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