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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, and the description's 'its server marks it read-only, so it runs straight away' merely restates that rather than adding new behavioral context. It does clarify the return is a list of registered abilities, which is modest added value.

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?

Three short sentences with the core purpose front-loaded. The trailing 'Through Royally' clause is redundant with the annotations and could be dropped, but otherwise there is no padding.

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 simple read-only discovery tool this is nearly adequate, but with no output schema the description should say more about what 'basic information' per ability looks like (names, descriptions, input hints) so an agent knows what it can do next.

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?

Only one optional parameter (site_id) with full enum documentation in the schema, so the schema carries the semantics. The description adds nothing about scoping to a site, so baseline 3 applies.

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?

Clear specific verb and resource: 'Discover all available WordPress abilities' plus what is returned. It does not, however, distinguish itself from the sibling mcp-adapter-get-ability-info or execute-ability, which an agent could easily confuse it with.

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 statement of when to use this versus get_ability_info or execute_ability; the only extra clause is a note that it runs immediately, which is not usage guidance. The discovery-then-execute workflow is left entirely implicit.

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