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

With no annotations, the description carries the full burden, and it does disclose one real behavioral trait: the SKILL.md text is returned conditionally, 'when the license allows it'. That license-gated variability is genuinely useful. However it says nothing about unknown-slug behavior, error modes, or authentication, so the disclosure is partial.

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?

One sentence, no filler, and the key scoping constraint ('one skill by slug') plus the returned fields are front-loaded. Every clause carries 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?

There is no output schema, so the description rightly enumerates the returned fields (install command, source link, license, SKILL.md). For a simple single-parameter read tool this is nearly complete; only error and license-fallback specifics are absent.

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 0%, so the description must compensate; 'by slug' is the only semantic it supplies, establishing the identifier type but not format, case sensitivity, or where a slug comes from. This is the minimum needed to call the tool, not more.

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?

States a concrete verb (get) and resource (one skill), and the phrase 'one skill by slug' implicitly separates it from the sibling search_skills, which returns many. It also enumerates what the record contains, so the agent knows what it gets back. It stops short of explicitly naming the alternative, so not a 5.

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?

Usage is only implied: 'by slug' signals this is the follow-up to a search that produced a slug, but there is no explicit when-to-use or when-not-to-use statement and search_skills is never named as the alternative. Adequate but leaves the routing to inference.

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