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

Annotations already declare destructiveHint=true, openWorldHint=true and idempotentHint=false; the description reinforces this by explaining that a name clash 'fails rather than being adjusted' (non-idempotent behavior) and by disclosing a side effect the annotations cannot express: a `blog.created` webhook fires to organization subscribers. It does not cover auth/permission requirements, but the added side-effect context is genuine value beyond the structured hints.

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 dense sentences with zero filler: identity/scope first, the consequential uniqueness rule second, the side effect third. Every sentence carries information an agent can act on.

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?

An output schema exists, so return values need not be explained, and the annotations cover the safety profile. The description closes the biggest functional gap (failure-on-name-clash and webhook emission), but omits permission requirements and validation constraints for the non-required parameters.

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 60%, with `name` already documented in the schema as the globally-unique subdomain and `locales`/`defaultLocale` partially documented, so the description largely repeats the schema on `name`. It adds nothing about locales, description or articlesFormat, leaving the uncovered tail of parameters undocumented in both places.

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 ('Create a new Polyblog blog') and scopes it to 'the signed-in organization', which is concrete and unambiguous. It stops short of naming or contrasting with siblings (e.g. create_article, get_blog), so an agent gets a clear purpose but no explicit routing signal.

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?

Usage is implied by the name and description rather than stated: there is no explicit when-to-use, no prerequisites (e.g. org admin rights), and no mention of alternatives like get_blog or list_blogs. The one useful constraint given is that a clashing name fails rather than being auto-adjusted, which implicitly tells the caller to check name availability first.

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