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

With no annotations, the description carries the full burden. It usefully discloses what comes back (the install command and SKILL.md content), which is real behavioral value, but says nothing about failure modes for an unknown id, auth needs, or whether the SKILL.md body is returned in full.

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 with the verb and key front-loaded and no filler. Every clause (id format, return contents) earns its place.

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 simple single-item read with no output schema, naming the returned artifacts is the main thing an agent needs, and it does that. Missing error/not-found behavior keeps it from being fully 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 coverage is 100% and the only parameter is fully documented with an example, so the baseline is 3. The description's 'owner/repo/slug' decomposition adds modest structural meaning but largely restates the schema's example format.

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 specific verb and resource ('Get full details for one skill') plus the scoping key ('by its id'), which clearly separates it from the list/search siblings. It stops short of naming those siblings explicitly, so differentiation is inferred rather than spelled out.

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 phrase 'by its id' implies the tool is for lookups when an identifier is already known, and that search_skills would be the path to obtain one, but neither condition nor alternative is stated. Usage is only implied.

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