add_divider

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. It says nothing about permissions, insertion behavior, whether the divider is appended to a section/column, or what happens on failure, leaving a mutation tool completely opaque.

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 single sentence is technically concise and front-loaded, but for a 4-required-parameter tool it is under-specified rather than appropriately sized. It omits all necessary invocation details, so brevity here is a liability.

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 annotations, no output schema, and 0% parameter documentation leave the definition severely incomplete. An agent cannot determine where the divider goes, what identifiers are required, or what the call returns.

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% and the description does not mention any of the four required parameters (siteId, pageId, sectionIndex, columnIndex). For a 4-parameter tool with zero schema documentation, the description should compensate but adds no meaning at all.

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 ('Add a horizontal divider'), which is clearer than a tautology. However, it offers no differentiation from the sibling 'add_spacer', which an agent could easily confuse with a divider in a page-building context.

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?

No guidance on when to use this tool versus alternatives like add_spacer or add_section. The agent must infer placement context entirely from the schema, with no textual routing.

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