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

Annotations already cover safety (readOnlyHint=true, destructiveHint=false, openWorldHint=true). The description adds real value beyond them by disclosing the return payload: a distilled guide, a real PHP/JS snippet, the source docs URL, and related entry ids. This matters because there is no output schema. It does not explain the unusual idempotentHint=false, but that is minor.

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?

One sentence, front-loaded with the action and resource, with the parenthetical source and the return-content list earning their place. Zero filler.

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 concretely (guide, code snippet, docs URL, related ids). Combined with the 100%-covered single parameter and read-only annotations, an agent has everything needed to call and interpret it.

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 coverage is 100% and the schema already documents the id format with two examples, so baseline 3 applies. The description goes slightly beyond by naming the provenance of the id (elementor_search results), which helps the agent supply a valid value.

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?

Specific verb (Fetch) + resource (one Elementor knowledge entry) + cardinality (one), and it explicitly ties itself to the sibling elementor_search as the source of ids. An agent can distinguish elementor_get from elementor_search/elementor_categories without opening schemas.

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?

States the precondition clearly: the id comes 'from elementor_search results', which tells the agent this follows a search. It doesn't spell out a when-not case (e.g. use elementor_search when you don't have an id yet), but the workflow is unambiguous.

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