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

Annotations already cover safety (readOnly false, destructive false, openWorld true, non-idempotent), and the description adds real context beyond them: the live reader URL shape (/p/:slug) and the returned fields (articleId, slug, url, blogMirrorUrl, timestamp). It stops short of stating permission or rate-limit requirements, which keeps it from a 5.

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 front-loaded sentences with no filler: destinations first, then the canonical workflow, then the return payload. The platform list and return-field list are dense but each item earns its place. Slightly long, but efficiently organized.

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?

There is no output schema, so naming the returned articleId, slug, url, blogMirrorUrl, and timestamp fills a real gap. With 10 parameters and three actions, the description also clarifies which action (publish vs update) fits the workflow. Only the authorization/permission story is left unaddressed.

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%, so every parameter is already documented in the schema, and the description adds no syntax or format detail beyond what is there. The one workflow hint (pass canonical URL when cross-syndicating) is already covered by the canonicalUrl schema description. Baseline 3 is appropriate.

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 (publish or update) and resource (long-form Markdown SEO articles) and enumerates the concrete destinations (Nuntior, Ghost, WordPress, Webflow, Dev.to, Medium, Hashnode). It explicitly contrasts with sibling posts_publish, which handles social sharing after the canonical URL exists, so an agent can pick the right tool without opening a schema.

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?

Gives an explicit when-to-use workflow: publish the full technical article first to get a live canonical URL, then pass that URL into posts_publish with xLinkStrategy 'first_reply'. That names both the condition that selects this tool and the alternative it hands off to.

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