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

The annotations already establish readOnlyHint, idempotentHint and non-destructive behavior, so the safety profile is covered. The description adds useful behavioral context beyond the annotations: newest-first ordering, cursor pagination, and the fields returned for each item, which helps the agent understand what a call will produce.

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?

Two tightly written sentences with no wasted language. The core purpose and ordering are front-loaded, followed immediately by the pagination mechanism and return shape.

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?

Because there is no output schema, the description correctly compensates by naming the item fields (slug, title, summary, date, author, URLs) and explaining pagination. It could be slightly more complete by clarifying end-of-list behavior or whether next_cursor can be absent, but for a simple read-only list tool it covers the essentials.

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 both parameters are already documented in the input schema. The description reinforces cursor reuse via next_cursor and explains the ordering and returned item fields, but it adds little parameter-level meaning beyond what the schema already provides, making the baseline 3 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?

The description states a specific verb and resource: it lists posts from the Cotal build log, newest first, with cursor pagination. That is clearer than a generic list tool, but it never explicitly contrasts itself with close siblings such as cotal_list_my_posts or cotal_search, so an agent must infer the difference from the name alone.

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 scope (browse the public build log) and by the instruction to pass next_cursor for the next page. There is no explicit when-to-use or when-not-to-use guidance, and no mention of when cotal_list_my_posts or cotal_search would be better choices.

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