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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world behavior. The description adds real value beyond that: newest-first ordering, returned fields per post (status and, once published, its web address), and the empty-blog edge case. Pagination/limits are not disclosed, keeping it just short of full transparency.

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 well-formed sentence front-loads the core purpose and packs in ordering, return fields, and the empty-blog edge case with zero wasted words.

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 one-parameter read-only list tool with no output schema, the description adequately explains what is returned (posts with status and published URL) and ordering. Absent pagination or result-limit behavior, it is nearly complete but not exhaustive.

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 a single documented 'site' parameter, so the schema carries parameter semantics. The description references 'a Pagehaus site's blog' consistently but adds no syntax or format guidance beyond the schema. 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 (Lists) and resource (the posts of a Pagehaus site's blog) and adds ordering (newest first) and returned fields (status, web address). This distinguishes it from siblings like read_post (single post) and write_post (mutation), so an agent can identify it without opening the 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?

Usage is implied by the listing purpose and the note that no posts are returned when no blog exists, but there is no explicit when-to-use guidance or named alternative (e.g., read_post for a single post). The agent must infer the appropriate context.

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