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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is carried by structured data. The description adds genuinely new behavior: the skill result is preceded by which of the tools it references this connection can actually call, and why for those it cannot — a preflight capability an agent would not infer otherwise. It also notes the server-marked read-only status means the call runs without approval, though that partly restates the annotation.

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?

Front-loaded with the core definition, then the three call modes in order of increasing specificity — an efficient structure for scanning. The closing read-only sentence is partly redundant with the annotations and slightly padded ('Through Royally'), keeping it just short of a 5.

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 must convey return shape, and it does: steps to follow, an availability preamble for referenced tools, or a reference file body. What it does not specify is the format of the returned steps or how a tool-availability failure should be acted on (skip the step vs. abort), which is the only remaining gap for a tool agents are told to obey.

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%, so the baseline would be 3, but the description adds the conditional semantics the schema cannot express: omitting `name` lists skills, adding `name` returns that skill plus a tool-availability report, and adding `file` switches the return to a reference file path. That coupling of parameters to distinct behaviors is real value beyond the per-field descriptions.

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 a skill') and defines what a skill actually is — step-by-step instructions for a multi-step job such as health review, setup, or restyling. The three call modes (no args = list, name = fetch skill, name+file = fetch referenced file) make it unmistakable against the sibling ability tools that perform individual operations.

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?

Explicitly says to call it *before* starting such a job and to follow the steps it returns, which is a real routing instruction rather than a vague hint. It also tells the agent how to discover available skills first (call with no arguments), covering the discovery-then-execute sequence.

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