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

Annotations already declare readOnly, idempotent, closed-world, and non-destructive, so the safety profile is covered. The description adds a genuinely non-obvious behavior: scripts are returned as text and are never executed, which is important context an agent cannot get from annotations. It stops short of covering missing-file errors, binary/oversized files, or how version resolution behaves.

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 very short sentences with no filler, and the key behavioral caveat about scripts is placed where it will be seen. The first sentence is compressed to the point of being ungrammatical, which slightly hurts readability.

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, the description does the minimum by stating the return is text, and all three parameters are documented in the schema. However, it omits what happens on a missing path, whether directories or binary files are rejected, and how version selection interacts with permissions, leaving real gaps for a file-reading 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?

Schema description coverage is 100%, and the schema already explains name formats, path examples, and the version default ("the latest you may use"). The description adds no parameter meaning beyond that, 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 phrase "One file of a skill, as text" conveys the resource and return format, but it is a sentence fragment with no verb, so the action (read/retrieve) must be inferred from the tool name. It does not contrast itself with siblings like skills_load or skills_list, so an agent gets only partial disambiguation.

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?

There is no statement of when to use this tool, when not to, or which sibling to prefer for whole-skill retrieval versus single-file retrieval. The agent must infer the read-one-file vs load-whole-skill split from names alone.

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