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

Annotations already declare readOnlyHint=false, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds only the taxonomy context and which fields are optional; it says nothing about duplicate-name behavior, permission requirements, or whether the taxonomy must already exist.

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?

A single front-loaded sentence with no filler. It is efficient, though the brevity comes at the cost of the missing semantics noted above.

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?

A 5-parameter mutation tool with 0% schema coverage and no output schema needs the description to explain the parent ID relationship, duplicate handling, and at least that a term ID is returned for follow-up calls. None of that is present.

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%, so the description must carry the parameter meaning, and it only names three fields (slug, description, parent) and labels them optional. Critically, it never explains that 'parent' is the integer ID of an existing term in the same taxonomy, nor what slug format is expected.

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 (create a term) plus the domain (taxonomy, category/tag), which is enough to distinguish it from wp_update_term or wp_get_terms. It does not explicitly distinguish itself from the near-neighbor wp_add_post_terms, which assigns existing terms rather than creating them.

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?

The 'such as a new category or tag' phrasing hints at use, but there is no statement of when to choose this over wp_add_post_terms (attach existing term) or wp_update_term (modify existing term). No prerequisites or exclusions are given.

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