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

Annotations already declare readOnlyHint=false, destructiveHint=false, idempotentHint=false and closed-world scope, so the safety profile is covered. The description adds no behavioral context beyond that: it says nothing about required capabilities, whether a duplicate name is rejected, or what happens to the created menu afterward.

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 short sentence with no filler, front-loaded on the verb. It is arguably too terse rather than verbose, but nothing in it is wasted.

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?

The tool is simple (two required string params) and annotations cover the write semantics, but with no output schema the agent has no idea whether a created menu identifier is returned, which matters for chaining into wp_create_menu_item. The description also fails to resolve the wp_create_menu vs wp_create_navigation_menu ambiguity, leaving a real gap for a paired tool set.

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%, and both parameters carry their own explanations (including the explicit warning not to pass a URL or post ID for site_id). The description adds no parameter meaning beyond the schema, so the 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?

The description states a specific verb and resource ("Creates a new navigation menu"), which is unambiguous enough for an agent to know the operation. It does not differentiate itself from the similarly named sibling wp_create_navigation_menu, so the agent gets no help choosing between the two menu-creating tools.

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?

There is no when-to-use guidance, no prerequisites, and no mention of alternatives such as wp_create_navigation_menu. The only procedural hint (call list_sites first for site_id) lives in the schema, not the description.

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