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

No annotations are provided, so the description carries the full burden of behavioral disclosure, and it discloses nothing. It does not say whether linking is a write/mutation, whether it is reversible, whether it requires permissions or a consent step, whether it creates an implicit relationship object, or what it returns.

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 sentence, but brevity here is under-specification rather than economy — there is no waste because there is almost no content. Nothing is front-loaded beyond the tautological restatement.

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?

Three parameters, zero schema descriptions, no annotations, and no output schema; the description supplies none of the missing context. For a domain-specific relational tool that mutates state, this is wholly inadequate to invoke correctly.

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 0%, so the description must compensate entirely and does not. "Two cubes" faintly maps to src/dst, but neither is described (ID? name? path?), and the third parameter `kind` with default "progress" is completely unaddressed, leaving the agent to guess at the meaning of the most important discriminator.

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?

"Link two cubes" restates the tool name (cube_link) almost verbatim and never defines what a "link" is in this domain. It gives no signal for distinguishing it from cube_create, cube_install, cube_consent, or cube_vote, all of which plausibly operate on cubes.

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?

There is no guidance on when to use this tool, no prerequisites (does linking require consent? a prior cube_create?), and no mention of any sibling as an alternative. An agent has no basis for choosing cube_link over the other nine cube_* tools.

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