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

Annotations already cover the read-only/idempotent/closed-world profile, and the description adds real context beyond them: no provider requests, no credit charge, owner-only access, and an availability constraint tied to live publication being disabled. It still doesn't say what happens on an unknown/expired callId.

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?

Four short sentences, front-loaded with the core action and cost profile. The trailing sentence about 'live publication is disabled' is slightly opaque but does carry a real availability condition.

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?

No output schema, so return values needn't be spelled out, and the safety profile is annotation-backed. However, for a two-param retrieval tool with a large enum and no parameter documentation, the description omits failure behavior and how to map a desired result to a specific skillSlug/callId pair.

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?

With 0% schema description coverage, the description must compensate; it does so only partially by noting the slug and callId must be the 'original' ones from the accepted call. It gives no guidance on picking among the ~90 skillSlug enum values or on the callId UUID 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 ('retrieval of a previously accepted SEO call') and scopes it with 'owner-only'. It implicitly distinguishes itself from the many sibling SEO skill tools by retrieving an existing result rather than running a new provider call, though it never names those siblings outright.

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?

'Free... Never sends provider requests or charges credits' hints strongly at the use case (re-fetch instead of re-running a paid SEO skill), but the choice is left to inference. No explicit when-to-use/when-not, and no named alternative such as re-invoking the underlying seo-* tool when no prior call exists.

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