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

Annotations already declare readOnly, idempotent, non-destructive, open-world behavior, so the safety profile is covered. Beyond that, the description discloses return-shape behavior that no schema documents: a package path yields a skill listing plus declaration sources, a SKILL.md yields the full guide, and listing names are relative to the read path. Error handling and failure modes are not covered.

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 verb and resource lead the description, and the four sentences are dense with no filler. The second sentence about user action is slightly tangential to a read operation but still carries actionable instruction, so the text earns most of its length.

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 carries the burden of explaining return values, and it does distinguish the two result shapes (listing versus full guide). An agent has enough to call it correctly; only error or empty-result behavior is left unstated.

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 single path parameter already carries an example, so the baseline is 3. The description earns above baseline by adding provenance semantics (paths originate from search or listings) and the non-obvious rule that listing names are relative to the path that was read, which the schema does not state.

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 names a specific verb and resource (read a skill guide or declaration) and explains the two content types it returns: a workflow guide with prerequisites versus an API declaration. It doesn't explicitly contrast itself with search_skills by name, though the path-provenance sentence implies the relationship.

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?

It gives clear usage context: paths come from search results and read_skills listings, which routes the agent from search_skills to this tool, and it states what the agent should do next (surface the documented command or URL) when user action is required. There is no explicit 'do not use this for X' exclusion, which keeps it below a 5.

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