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

Beyond the readOnly/idempotent annotations, the description discloses the return shape (raw CSS string with selectors, @media(--breakpoint) blocks, and &:hover/&:focus/&:active states resolved as the frontend renders them) and confirms the server marks it read-only so it executes without confirmation. It does not say what happens when a tag has no default styles (empty string vs. error).

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 purpose and return format are front-loaded in the first two sentences with no wasted clauses. The closing sentence about the server marking it read-only partly restates the annotations, which is mildly redundant but does add the practical 'runs straight away' implication.

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?

With no output schema, the description carries the return-value burden and does so well: format, included constructs, and frontend-resolution semantics are all stated. The remaining gap is behavior on an unsupported or style-less tag, which is minor for a read-only lookup.

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 100%, so both parameters are already documented in structured data and the baseline of 3 applies. The description reinforces the tag parameter by enumerating h1..h6, p, a, section, div, button, but adds no syntax or edge-case guidance 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?

States a specific verb and resource: returns the active kit's site-wide default styles for one HTML wrapper tag, as a raw CSS string. It also scopes the tool by excluding widget-specific base styles, though it never names the sibling tool (e.g. elementor-get-widget-schema) that would be used instead.

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 implied by the scope statement ('for a single HTML wrapper tag', 'only the kit's site-wide default layer'), but there is no explicit when-to-use/when-not-to-use instruction and no routing to sibling tools such as royal-mcp__elementor_get_kit_globals or elementor-get-widget-schema.

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