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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, and "Read-only; changes nothing" simply repeats that. The only novel claim, "Money is integer minor units (cents)," is irrelevant to a schema containing limit and status, so it adds noise rather than behavioral context.

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 terse sentences, front-loaded, no padding or repetition in form. However, the money/cents sentence does not earn its place for a blog-post reader and the read-only sentence duplicates structured annotation data.

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 simple list tool with annotations covering safety, the description still omits the central facts: that it lists posts, their ordering, and that results are limited/paginated. That framing survives only in the schema's own description text, not in the tool description an agent selects from.

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% (limit default 20, status default all), so the schema already documents both parameters; per the high-coverage baseline this is a 3. The description contributes no parameter semantics at all, and its currency note does not apply to either parameter.

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?

"Blog posts" merely restates the tool name and never states a verb or action — an agent cannot tell from the description alone whether this lists, counts, or retrieves posts. The sibling blog_posts_create exists, so an explicit contrast (read vs. create) was available and unused.

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?

No when-to-use, when-not-to-use, or alternatives are given. A sibling named blog_posts_create makes the omission more glaring, since the obvious selection question is 'read vs. write' and the description never addresses it.

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