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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint, so the safety profile is covered. The description restates this twice ("Read-only" and "Through Royally: read-only, runs straight away"), adding only the mild signal that no confirmation step is required; it discloses nothing further about output or scoping.

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?

Front-loaded with the purpose and examples in the first clause, which is the right ordering. It loses a little to redundancy, since read-only is asserted twice and duplicates the annotation.

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 zero-required-parameter read tool with rich annotations and full schema coverage, the description supplies enough to call it correctly, and no output schema means return values needn't be explained. A short note about when to prefer it over the update sibling would close the remaining gap.

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% with the single site_id parameter fully enumerated and documented, so the schema does the heavy lifting. The description merely echoes the site in parentheses and adds no syntax or selection guidance beyond it, which matches the baseline 3 for high-coverage schemas.

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 ("Get the WordPress permalink structure") and illustrates the return format with two concrete examples, so the agent knows exactly what comes back. The contrast with the sibling wp_update_permalink_structure is implicit in the verb but never called out.

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 guidance on when to reach for this instead of an alternative, no prerequisites, and no exclusions. The only contextual statement, "runs straight away," describes execution behavior rather than when to use the tool.

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