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

readOnlyHint=true is already declared, and the description adds meaningful context the annotation cannot: this tool produces content for the caller to act on rather than performing the installation itself, and it spells out which downstream actions are unconditional (save skillMd, ask questions once) versus conditional (create the routine only if the user agrees). It does not discuss failure modes for an unknown slug, but the behavioral profile is materially clearer than the annotation alone.

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 sentences with no filler; the payload enumeration is front-loaded and the action instructions follow. The long comma-separated list of deliverables reads as dense but every item conveys scope the agent otherwise wouldn't know.

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, and the description essentially serves as one by enumerating exactly what comes back and what the agent is expected to do with each piece. For a two-parameter read-only tool, nothing essential for correct invocation is missing.

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 both parameters carry descriptions, including the platform enum and its default, so the schema does the heavy lifting. The description only gestures at parameters indirectly through "the ready-to-paste prompt for your platform," adding no format or constraint detail beyond the schema.

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?

Names a specific verb and resource ("install one skill") and immediately enumerates the payload (SKILL.md text, prompt, steps, schedule, questions, safety notes, URLs), so an agent knows this is a one-shot install package rather than a lookup like get_skill. The "one skill" scope implicitly distinguishes it from install_bundle and install_team, but none of those siblings are named explicitly.

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 workflow guidance for what to do after calling ("Save skillMd as a skill, ask the setup questions once, and create the routine only if the user agrees"), which is genuinely useful sequencing. However, it never states when to choose this over get_skill or install_bundle/install_team, so the routing decision is left to inference.

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