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

The annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds that the returned schema is the 'published' one for version 1.0, implying a static reference document, but says nothing about response shape (raw schema vs. wrapper), caching, or whether other versions exist.

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?

A single front-loaded sentence with no preamble and no waste. Every word (verb, 'published', 'VideoSpec', '1.0') carries information.

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?

For a zero-parameter, annotation-covered reference fetch, the description is nearly complete: it names the artifact and its version, which is what the agent needs before calling. With no output schema present, a brief note on what the response contains (the schema object itself) would close the remaining gap.

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?

The tool takes zero parameters and the input schema is an empty object, so there is no parameter semantics to explain — baseline 4 applies. The pinned '1.0' in the description usefully confirms version selection is not a parameter.

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 ('Return') and resource ('the published JSON Schema for VideoSpec'), with the version pinned to 1.0. It is clearly separable from get_carousel_schema by resource, though it never names the adjacent tools (scaffold_video_spec, get_creative_guide) that an agent might confuse it with.

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?

Usage is only implied: you call it when you need to know the VideoSpec shape, presumably before writing or scaffolding a spec. There is no explicit 'use this when' or 'use X instead when' statement, and no mention of how it relates to scaffold_video_spec or get_capabilities.

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