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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so safety is covered. The description usefully reinforces this ('Changes nothing') and adds scope nuance (Magento defaults to the default store scope), but says nothing about auth requirements, result volume or pagination behavior beyond the schema's limit field.

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?

Two sentences, front-loaded with the core verb and resource, and free of filler. The parenthetical plugin and entity lists make the second sentence dense, but every clause carries real scoping 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 7-parameter, zero-required, read-only list tool with no output schema, the description covers platform support, entity coverage, the missing-filter behavior and the no-mutation guarantee. Pagination and search semantics live in the schema, which is acceptable here.

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 already 86%, which sets the baseline at 3. The description restates the meaning of 'missing' ('keeps only entries without that field') and clarifies the WordPress-vs-Magento list semantics, but adds little beyond what the schema's own parameter descriptions already provide.

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 ('List') and resource ('SEO titles, meta descriptions or image alt texts'), then bounds the scope by platform (WordPress with four named SEO plugins, or Magento 2 with products/categories/CMS pages/images). An agent can immediately separate this read tool from the mutating siblings seo_fields_apply and seo_fields_undo.

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?

'Changes nothing' makes the read-only context explicit and the 'list' verb implies this is the inspection step before seo_fields_apply. It never explicitly names apply/history/undo as the alternatives, so it falls just short of the 5-level routing guidance.

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