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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is fully covered. The description adds only that the payload includes post details and the Markdown body; it says nothing about what happens if the site or slug does not exist.

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 front-loaded sentence with zero filler; the verb and scope come first and the return contents follow. Nothing could be trimmed without losing information.

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 two-parameter read-only tool with full schema coverage, rich annotations and no output schema, the description is nearly sufficient. The only real gap is failure behavior for an unknown site or slug.

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 the slug parameter even includes a concrete example ('hello-world' for /blog/hello-world/), so the schema carries the parameter burden. The description adds no parameter meaning of its own, which is the expected baseline here.

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 ('Reads') and a precisely scoped resource ('one post of a Pagehaus site's blog'), which implicitly contrasts with the list_posts sibling. It stops short of naming that alternative, but an agent can still tell what this returns.

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?

'Reads one post' implies single-item retrieval rather than enumeration, and the required site+slug pair implies an already-known post. However, there is no explicit 'use this instead of list_posts when…' routing statement or precondition such as needing the slug first.

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